My 20g cycled tank is now completely covered in brown, rust colored stuff. When I vaccuum gravel it wont come off... its covering my glass and plants too.
I have mollies who nibble on it. But every day its getting worse.
I have 4 plants. Nitrates are 20ppm and pH is 8.
I use flourish excel every other day and flourish once a week if I remember.
I also add equilibrium for gh
My lights are on 8-12 hours a day 48w.
Does the stuff I add increase the brown diatoms or is it just happening because its only been 2 months since cycle completed?
Any tips for getting rid of this quickly without killing plants?