I've got a ten gallon tank, with one betta and six neon tetras. I top up the tank about once every two weeks, and do a partial (1/3) change once a month. My problem is that I've got algae growing out of control. I got some TopFin AlgaeGone, but it's not helped at all.
First of all additives are not always the answer , try changing your lighting schedule by cutting it in half , more frequent water changes every 2/3 days till it clears up than start a new schedule once a week , lighten up your feedings to every other day,
simple things like this will make the difference , additives are a quick fix only masking the problem , the simple suggestions I mentioned should put you back on the right track and resolve your issue ,
and by the way welcome to AA