just curious. iv'e had my tank up and running for about a month now and have completed the
nitrate cycle. NH,
NO2 and
NO3 are all at 0.0.
today i did approx 10%
water change and decided to wash out my filter sponge. i havn't done any filter maintanance since i started my tank. i have a hang on the back type filter with a sponge, carbon and bio stones.
i washed it out with some of the water from the tank as i was changing it and i noticed it was quite dirty. i dont understand exactlly where all the beneficial bacteria hang out. i was under the understanding its mainly in the bio stone.
it occured to me though and i'm curious if alot of the bacteria also are in the filter sponge and will this effect NH, NO2 or NO3 levels immediatelly after cleaning?