It's a 55 gallon tank with a three year old 9" or so Tiger Oscar, and a 7" Common Pleco. Waterchanges are about 25% once a week. Filtration is provided by an AquaClear 500, and an AquaClear 200. Filter media (just filter floss) is rinsed at waterchanges, and replaced a few times per year. There's an AquaClear powerhead in there for circulation too, I think it is about 300 gph. 2" of natural gravel that averages about 1/4" diameter. Gravel is vacuumed profusely during waterchanges. There's a few lava rocks in there too. The Oscar has had hole-in-the-head for years...is that from poor water quality?
Temp ~ 74-76
Am ~ 0
Ni ~ Trace
Na ~ 75 ppm
Temp ~ 74-76
Am ~ 0
Ni ~ Trace
Na ~ 75 ppm