Hello, this is in regards to a 25 gal fish tank with a white film build up on the glass. I had to scrap it with a plastic card to get it to come off. I have no idea what it is and trying to get rid of it, no white spots on the fish at all, by the way.
Fish population: 1 red male veil tail beta, 1 male cherry barb, 2 female cherry barb, 1 male(?) green catfish, 1 female(?) panda catfish. All look healthy and active.
pH: 7.6
ammonia, NO2, NO3: all zero
water temp: 80F
thanks in advance