coridora

Tank size: 13gal tank age: 2 years+ pH: 7.0-7.5 ~ ammonia: 0 nitrite: 0 nitrate: normally ~10mg, after 2 weeks without water change - climbs up to 50mg~ kH: n/a (water hard with high chalk content = tons of residues) gH: n/a (water hard with high chalk content = tons of residues) tank temp...