Tetra FilterActive

$2.83 ~~$4.49~~ In stock

Tetra Filter Active 2in1 - Bacterial Starter

Tetra FilterActive keeps the filter biologically active and keeps it cleaner for longer with its natural action. It contains live starter bacteria and sludge-reducing cleaning bacteria that accelerate the biological degradation of ammonia, nitrite, fish waste, sludge, food and plant remains and filter mud.

Water change
Stabilise water values
Eliminate ammonia and nitrite
Bacteria

Sizes:

100ml
250ml

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Customer Reviews (4.3 / 5 · 4 reviews)

Alexander P. ★★★★★ Oct 20, 2026

The sludgy buildup in my filter used to be a weekly chore, but since I started adding this stuff it's been noticeably easier to keep clean. The live starter bacteria really seems to do its job keeping the biological balance going.

David ★★★★★ Oct 18, 2026

Set-up was much smoother than my last tank cycle because the live bacteria got the filter working right away. The water cleared up in just a couple of days, and I haven't seen any sludge buildup since.

Emma ★★★★☆ Oct 21, 2026

I was a bit skeptical about live bacteria in a bottle, but after adding this to my new tank, the filter seemed to stay cleaner and the water cleared up faster than usual. The natural sludge-eating action is a nice bonus, though I wish the instructions were clearer on dosage.