This one is severely overstocked, with near 20 molly juveniles + 20 mystery snail. I use sponges as the sole fitlration method in both my 5 gallon shrimp tank and my 20 gallon molly fry nursery. The bacteria you remove (minimal) when doing this will quickly reestablish in your tank, bacteria multiply exponentially. Grab some of the water in a big container, and do several squishes to your sponge, that's all I do with my sponge filters/intakes. The best of both worlds would be to have an intake sponge in a canister/hang on back.Īs for cleaning them, just do it when you do a water change. Sponge filters seem to be the absolute best when it comes to biological filtration, but are near useless when pulling particulate matter. It managed to break down an incredible 3.15 grams of pure ammonia (70 ppm) in a 12G (45ℓ) aquarium in 24h.įor an idea: This amount of ammonia is produced by more than 10 kg of adult Neon Tetras in 24 hours. The most effective filter medium in the degradation of ammonia (nitrification) has proved to be an ordinary foam filter called sponge filter. He tested a sponge filter, and he found out that just a regular, less than $10sponge filter was able to process a massive amount of 70ppm ammonia in 24 hours, somethig which he claims no other filtration method managed to do.įrom the experimen, for those who don't wanna read: Check out this experiment this person did a while back:
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