30G bowfront with a Penguin 250.
4 small Yellow Labs
1 Firemouth which is my favourite and a survivor.
1 Pleco which is pretty much a **** machine - Planning a hospital tank for it.
My tank has been set up with all levels being dead on from readings by my test kit and my LFS.
The tank has been very stable for months thanks to the incredibly useful information from the good people on this forum.
2 months ago I bought a Python vac and did a 40% change. Previously I'd used a siphon type and a bucket.
Ever since I used the Python my fish seem to be hiding from me, I'll approach the tank and they'll all hide. According to a fish-keeping friend I'm too gentle and need to "Get in there" and vacuum it but I prefer to not try to decapitate my fish by being careful.
They used to crowd round the front of the tank when I went to feed them but it takes a few minutes for one of them to come forward which is when a few more will venture out to see me.
The Penguin seems to clog up within 3-4 days with darkish green slime, I've started to put 2 sets of filter media in there so I can turn the filter off for a minute or 2 so I can rinse the first cartridge without clouding up the water and letting the rubbish getting back in.
I don't overfeed, I don't think my tank is overstocked and I clean regularly, the filter is pulling water however the biowheel did stop for a few hours once due to the buildup of slime on the filter media which was only 3 days old.
Would a canister filter help? I can live with rinsing the media over buying these expensive Penguin C-size every other week.
The tank isn't in direct sunlight and the only algae I have is a little brown on a rock.
I'm scared to vac again because of the stress on the fish.
Edit: I tried the 3rd party Ginger filters and cut-to-fit media, it's cheaper but doesn't solve my build-up problem.