The tank is well established as originally had tadpoles in it. Once they left 1/4 of the water was kept as I'd lowered it as they turned into frogs and were released. I just have water snails, plecos and one neon tetra remaining now. I put a sponge bit over the end of filter now. I got a new betta fish and doing ok so far.
The tank is so clean that with 10% water changes the tank is not looking dirty at all ever. I did do a ph test at the shop...dont kno much about tests...it was within the right range... sorry I cant remember what number...keep thinking was it 7? The line was probably the 2nd darkest color on the chart the guy had at the shop.