Best Diesel Algae Treatment for Stored Fuel and Tanks

#1 · Best Overall

1. Power Service Bio Kleen

• Weight: 16 oz

Best for: Fuel-and-water microbial control.

Why it ranks #1: Its listed facts identify a diesel biocide that kills bacteria and fungus and works in both diesel fuel and water.

Power Service Bio Kleen works in both diesel fuel and water, a dual-phase feature that addresses microbial contamination across the two phases found in fuel systems. Its 16-fluid-ounce liquid format is aimed at buyers managing stored diesel or fuel-system contamination where bacteria and fungi are concerns.

The product is described as killing microbes, including bacteria and fungi, and its dual-phase action is specified for both diesel fuel and water. That matters for storage situations where water can be present alongside diesel, including biodiesel, which the supplied description notes can contain more water than standard petroleum diesel. The liquid comes in a 16-fluid-ounce bottle. The listing positions it for microbial contamination rather than for dispersing sludge or stabilizing fuel during storage.

Skip it if you need stated water removal and fuel stabilization; Power Service Clear-Diesel Fuel & Tank Cleaner lists both functions.

Choose Bio Kleen when microbial control in both fuel and water is the central need, particularly for stored diesel. The listing does not give a dose or treatment volume, so it offers less planning detail than products with stated coverage.

Listed on Amazon as: Power Service 09016-09 Bio Kleen Diesel Fuel Biocide – 16 oz.

#2 · EPA-Registered Pick

2. FPPF Killem Biocide

• Weight: 16 oz

Best for: Stored diesel tank maintenance.

Why it ranks #2: The product description identifies it as an EPA-registered fuel-oil biocide, and listed features say it controls bacteria and fungi.

FPPF Killem is an EPA-registered fuel-oil biocide that controls bacteria and fungi, making it a focused option for managing microbial growth in diesel storage. Its listed 16-ounce bottle treats 1,280 gallons according to the product features, giving storage-tank owners a stated treatment scale for planning fuel maintenance.

Killem targets bacteria and fungi, while its listed benefits also include reducing corrosion and slime. Those functions make it relevant when microbial growth and tank cleanliness are the maintenance concerns, rather than a general-purpose engine treatment. The 16-ounce bottle is specified to treat 1,280 gallons in the key features, which helps buyers relate the treatment to a storage volume. The product is supplied as a fuel-treatment bottle, with no additional application equipment listed.

Skip it if you need a treatment with a stated dual-phase action in both fuel and water; Power Service Bio Kleen lists that capability.

This suits diesel-storage owners seeking a biocide focused on bacteria, fungi, slime, and corrosion. Use the stated treatment volume as a planning reference, and note that the listing does not specify a maintenance schedule or application instructions.

Listed on Amazon as: 00119 KILLEM BIOCIDE 16 OZ. BOTTLE, TREATS 1920 GALLONS OF DIESEL FUEL PER BOTTLE

#3 · Dosing Guidance

3. Hammonds Biobor JF

• Weight: 1.25 lb

Best for: Multi-fuel tank biocide.

Why it ranks #3: This biocide targets diesel and other fuels; its listed dosing guidance gives initial and maintenance treatment rates.

Hammonds Biobor JF combines microbial control with sludge management and added lubricity, giving tank owners more than a bacteria-and-fungi treatment alone. Its listed uses span diesel, kerosene, biodiesel, and home heating oil, making it a versatile option for mixed fuel-storage needs.

Biobor JF helps prevent bacterial and fungal growth while breaking up or preventing sludge formation, addressing two related tank-maintenance concerns. The listed benefits also include fewer clogged filters and reduced bacterial corrosion to tanks. Added lubricity is specified for lower-sulfur diesel, connecting the treatment to that fuel type. The product lists initial-use and maintenance concentrations, so buyers have separate dose references for startup treatment and ongoing maintenance; the stated initial rate is 1 ounce per 40 gallons.

Skip it if you need a stated treatment volume of 1,280 gallons per 16-ounce bottle; FPPF Killem lists that coverage in its features.

Biobor JF suits owners maintaining tanks that hold diesel, biodiesel, kerosene, or heating oil, especially when sludge and filter clogging matter. Follow the listed initial or maintenance concentration appropriate to the treatment phase.

Listed on Amazon as: 16 oz Hammonds Biobor JF MicroBiocide Diesel Fuel Sludge Slime Bacteria Tank Treatment Biocide

#4

4. FPPF Killem Four-Pack

Best for: Bulk fuel-treatment supply.

Why it ranks #4: The four-bottle listing is formulated for microbial control in diesel and fuel-oil storage systems, though no per-bottle treatment rate is supplied here.

This four-bottle FPPF Killem listing packages an EPA-registered fuel-oil biocide for routine microbial maintenance across stored fuel systems. The treatment is described as helping control bacteria and fungi in diesel and heating-oil storage, while the multi-bottle format gives operators several bottles for ongoing maintenance needs.

Killem is formulated to help manage microbial growth, including bacteria and fungi, in fuel storage tanks. The listing specifies compatibility with diesel fuel, heating oil, and storage tanks, so it can serve systems using either named fuel. Its maintenance-oriented description supports routine use rather than presenting it as a sludge-removal or fuel-stabilizing product. Four 16-ounce bottles are included, but the supplied details do not provide a treatment rate or gallon coverage, limiting volume-based planning from this listing alone.

Skip it if you need stated gallon coverage for dosing plans; the single-bottle FPPF Killem listing specifies treatment of 1,280 gallons.

This package suits operators maintaining multiple fuel-storage points or keeping treatment on hand for routine use. Its stated fuel compatibility covers diesel and heating oil, but the listing lacks a dose rate, so volume planning requires details beyond the supplied product facts.

Listed on Amazon as: KILLEM – EPA Registered Fuel Oil Biocide for Bacteria Control, 16 oz (Pack of 4

#5 · Tank-Cleaning Pick

5. Power Service Clear-Diesel

• Weight: 4.85 lb

Best for: Contaminated-fuel cleanup.

Why it ranks #5: It removes water and slime and disperses contaminants; the listing specifically describes use alongside Bio Kleen during microbial cleanups.

Power Service Clear-Diesel combines water and slime removal with contaminant dispersion, making it a cleanup-oriented choice for diesel tanks rather than a biocide alone. Its fuel-polishing formula also stabilizes fuel for long-term storage, a useful pairing for buyers addressing contamination while maintaining stored fuel.

The formula disperses diesel contaminants and removes water and slime, helping address material associated with microbial contamination cleanups. It also provides long-term storage stability, so the same treatment can support fuel conditioning after cleanup. The product is listed as safe for all diesel engines and effective in ULSD and biodiesel, broadening its stated fuel compatibility. It works in conjunction with Bio Kleen to remove residual water and contaminants, but the listing does not provide a treatment-volume figure.

Skip it if you want a biocide explicitly stated to kill bacteria and fungi; Power Service Bio Kleen lists microbial-killing action.

This fits diesel owners handling water, slime, and dispersed contaminants, especially when long-term fuel stability matters too. It is a cleaner and stabilizer, not the listing’s explicitly named microbial-killing treatment; check that distinction against the problem at hand.

Listed on Amazon as: Power Service 09280-06 Clear-Diesel Fuel & Tank Cleaner – 80 oz.

#6

6. FPPF Sludge Be Gone

• Weight: 3.9 lb

Best for: Commercial fuel-storage programs.

Why it ranks #6: This treatment is intended for diesel, heating oil, and bulk storage, but its listed facts do not identify it as a biocide.

FPPF Sludge Be Gone is a liquid fuel conditioner listed for diesel, heating oil, and bulk fuel storage, with applications extending to generators, marine systems, HVAC equipment, and commercial fuel systems. Its two 32-ounce bottles suit ongoing storage-management programs across those named settings.

The formula is intended for routine fuel maintenance in storage tanks and bulk-fuel applications, linking its use to ongoing fuel-management workflows rather than a one-time engine treatment. Its listed compatibility with diesel and heating oil supports more than one storage-fuel type, while named settings include generators, HVAC equipment, marine applications, and commercial systems. The product is a liquid treatment supplied in two 32-ounce bottles. The available details do not provide a dose rate or specifically state that it kills bacteria or fungi.

Skip it if you need a stated biocide action against bacteria and fungi; FPPF Killem specifically lists control of both.

Sludge Be Gone suits professional or commercial operators managing diesel, heating oil, or bulk fuel across listed equipment and storage settings. The liquid format supports routine programs, but dosing details and explicit microbial-killing claims are not supplied.

Listed on Amazon as: 00342 Sludge Be Gone (SBG) Fuel Treatment for Diesel, Heating Oil & Bulk Fuel Storage Systems, 32 oz. (Pack of 2)

#7

7. ComStar BioFuel Treat

Best for: Biodiesel sludge and cold flow.

Why it ranks #7: Its 128-fluid-ounce treatment targets sludge in biofuels up to B20, but the listed features do not claim microbial control.

ComStar BioFuel Treat targets spider-web sludge and semi-solid biofuel buildup while lowering pour point for cold-weather flow. Its stated compatibility with biofuel blends up to B20 makes the one-gallon treatment relevant to users managing biofuel-related deposits and low-temperature handling.

The product is described as eliminating spider-web sludge and semi-solid buildup, which can otherwise clog alarms, vents, and filters according to its features. Its cold-climate protection lowers pour point to support fuel flow in freezing temperatures, connecting sludge management with a separate operating concern. The listing specifies compatibility with biofuel blends up to B20 and supplies 128 fluid ounces. Although called a 7-in-1 treatment, the supplied details do not enumerate all seven functions or provide a dosing rate.

Skip it if you need a diesel biocide explicitly stated to kill bacteria and fungi; Power Service Bio Kleen lists that function.

ComStar suits biofuel users facing sludge deposits and cold-weather flow concerns, especially with blends up to B20. It is presented as a broad biofuel treatment, but no dosing rate or explicit bacteria-and-fungi killing claim is supplied.

Listed on Amazon as: BioFuel Treat 1 gal 7-in-1 Fuel Oil Additive, Prevents Sludge

#8

8. Bell Marine Dee-Zol

• Weight: 2 lb

Best for: Marine diesel engine treatment.

Why it ranks #8: This marine diesel additive lists water control and detergency, but its features do not identify it as a microbial biocide.

Bell Performance Marine Dee-Zol combines detergency, cetane improvement, water control, and combustion enhancement in one marine-diesel treatment. That multi-function approach suits boat owners seeking injector cleaning alongside fuel conditioning, rather than a product described only as a microbial biocide.

The listed detergents clean fuel injectors, addressing deposits that the product description says can reduce marine-engine power and efficiency over time. Cetane improvement, water control, and combustion enhancement add several fuel-treatment functions in the same formula. The listing identifies it for all marine diesel engines, so its stated application is specifically marine rather than general fuel storage. It comes as a 16-ounce bottle, although the supplied information does not state a dosing rate or gallon coverage for that bottle.

Skip it if you need a treatment explicitly listed to kill bacteria and fungi; Power Service Bio Kleen states that microbial action.

Marine Dee-Zol fits boat owners seeking injector detergency and multiple fuel-treatment functions for marine diesel engines. Its listing does not identify microbial killing, so choose it for the stated engine-treatment features rather than as a confirmed algae biocide.

Listed on Amazon as: Marine Dee-Zol Treatment for Marine Diesel Fuel – 16 oz. Bottle

#9

9. Bell Marine Dee-Zol Case

Best for: Marine fleets buying cases.

Why it ranks #9: The case contains marine diesel additive bottles with water control and detergency, but no listed claim that it kills fuel microbes.

The case listing supplies twelve 16-ounce bottles of Bell Performance Marine Dee-Zol, pairing a bulk quantity with marine-diesel injector detergency and fuel conditioning. Its formula lists cetane improvement, water control, and combustion enhancement, making the case relevant to ongoing treatment across marine diesel operations.

Marine Dee-Zol’s detergents clean injector deposits, which the supplied description links to reduced marine-engine power and efficiency. Cetane improvement, water control, and combustion enhancement add complementary treatment functions, while the listing specifies use for all marine diesel engines. The twelve-bottle case suits buyers handling repeated or multiple marine applications, rather than someone needing only one bottle. The supplied facts do not state a dose, total gallon coverage, or a microbial-killing claim, so those needs are not established here.

Skip it if you need an explicitly stated bacteria-and-fungi biocide; Power Service Bio Kleen lists microbial-killing action.

This case fits marine operators who want multiple bottles of injector-cleaning, multi-function diesel treatment on hand. Its listed use is marine diesel, and the supplied information does not establish microbial killing or specify how much fuel the case treats.

Listed on Amazon as: Marine Dee-Zol Treatment for Marine Diesel Fuel – Case (12-16 oz. Bottles) – Save 22%

#10

10. Algae-X LG-X 500

• Weight: 2.5 lb

Best for: Installed fuel-system conditioning.

Why it ranks #10: This is an in-line fuel conditioner with a stated maximum flow of 90 GPH, not a listed chemical biocide for microbial growth.

The Algae-X LG-X 500 is an in-line fuel conditioner, not a pour-in biocide, and is specified for flow up to 90 gallons per hour. Its listed 1/2-inch port and up-to-500-horsepower range help identify the installation and system scale it is intended to serve.

As an in-line unit, the LG-X 500 is listed to clean the entire fuel system, including injectors, filters, and tanks. The product claims optimization of diesel combustion, filtration, and stability, with applications also listed for jet fuel, biofuels, gasoline, hydraulic fluid, and oil. The 1/2-inch port and 90-GPH maximum flow give buyers concrete connection and flow specifications to assess for a system. This is installed hardware, so it differs from bottle treatments used directly in fuel.

Skip it if you want a bottle-applied microbial treatment; FPPF Killem is a liquid biocide for fuel storage systems.

This fits owners seeking installed, whole-system conditioning within the stated 90-GPH flow and up-to-500-horsepower range. Consider the 1/2-inch port and in-line installation context; it is not a bottle treatment with a stated biocide claim.

Listed on Amazon as: In-Line Fuel Conditioner