I've got a 60 litre tank with guppys & mollys & swordtails.
I do a water change weekly & I "Hoover" the stones & wash the filter in removed tank water.
But my tank seems quite dirty.
It's ok when it settles, but when the stones move, loads of "crap" comes out.
The fish are not over fed.
But it was 3 months before I got a "Hoover" for the tank as I just did what the aquarium centre told me. And just used what they sold me.
It was nky going on a fish forum & seeing vacuum discussion that it occurred to me.
Have I got a build up of "crap" in the bottom of my tank.
Oh, the fish breed like stink. I should get a fry tank really.
Thank you.