I'm having problems with my internal filter clogging up so fast (a couple of days) that maintaining good tank aeration requires a lot of work. I want to know if there's anything we're doing wrong, whether the filter is useless, or if this is just the way it is? From what I've read, the filter should onyl need a good clean every couple of weeks with the water change.
I set up my first ever tank eight weeks ago, a small (35l) Arcadia Arc using the supplied Classica Powerbio 200 internal filter. The tank cycled without fish, with a java fern, log, stone and gravel. Everything worked fine until we put fish in (five pygmy corydoras for three weeks and now six endlers livebearers).
My problem is that the filter loses power too fast. We started out using the venturi attachment to aerate the water, but now this is ineffective after about a day so we switched to the spray bar. Even that isn't carrying enough water after three days.
We clean the (sponge) filter every couple of days at the moment, and though we get some sludge out and the power increases, it still clogs up within a couple of days.
The tank water is always crystal clear, though stained with tannins from the wood. We're only feeding the fish small amounts of tablet food (quarter tablet twice a day), as we were told to by our LFS.
I don't mind the extra work, but it means leaving the fish for more than a long weekend will be difficult! Help!