Filtration additive sera Preparat Filter Biostart 50 ml – biological filter starter for aquariums

sera Preparat Filter Biostart 50 ml is a liquid biological filter starter formulated to accelerate the establishment of beneficial nitrifying bacteria in aquarium filters. Supplied as a 50 ml bottle, it supports the rapid colonisation of filter media after setup, maintenance or stocking changes and helps reduce ammonia and nitrite peaks. The product is suitable for freshwater aquariums and is compatible with common filtration systems; it works alongside other sera biological products to stabilise water parameters and support fish health.

Advantages

sera filter biostart contains a balanced blend of live purification bacteria and biologically active enzymes that begin breaking down sludge from fish waste, uneaten food and decaying plant matter. Using this additive reduces the risk of toxic ammonia and nitrite spikes after cleaning or introducing new organisms, shortens the time needed to establish effective biological filtration and complements other sera products designed to continue and stabilise the nitrification process.

Suitable for

• Freshwater aquariums after filter cleaning or media replacement
• Newly set up tanks during the initial cycling phase
• Systems following stocking changes or after a disease treatment where biological load shifts
• Users who want to stabilise water quality quickly without immediate water parameter shocks

When it may not be suitable

sera filter biostart is not intended for saltwater or marine aquaria; its formulation targets freshwater nitrifying bacteria. It does not replace mechanical cleaning or appropriate water changes and will not remove chemical contaminants such as heavy metals or high phosphate levels on its own.

Key specifications

• Format: liquid dosing solution
• Volume: 50 ml
• Function: biological filter starter to promote nitrifying bacteria
• Intended water type: freshwater aquariums
• Active effect: supports reduction of ammonia and nitrite peaks by accelerating bacterial colonisation

How to use

Shake the bottle gently before use. Dose according to the manufacturer’s instructions relative to aquarium volume and follow any specific guidance for use after filter maintenance, media replacement or when adding new fish. Introduce the product directly to the aquarium or into the filter inflow area to help distribute bacteria through the filtration media. Monitor ammonia and nitrite levels during and after application and repeat dosing if recommended for complete biological establishment.

What to consider before purchase

• Suitable only for freshwater aquariums, not for marine use
• Complementary to other biological products and appropriate filter media for best results
• Not a substitute for mechanical cleaning, water changes or chemical treatments when required

Usage recommendations

Use sera filter biostart immediately after filter cleaning, media changes or when setting up a new aquarium. For optimal results, combine with appropriate filter media and follow up with sera bio nitrivec where longer-term nitrification support is needed. Regular water parameter checks ensure the biological balance is developing as expected.