1. I got them as a baby.
2. The light is on for 12 hrs, from 11 to 23
3. Dump in lots of feederfishes once a week.
4.Tankmates are bichirs.
5. One is in 180gal, the other is in 100gal.
6. I do water change once a week, (occasionally two weeks).
7. The RTG started to develop DE while it's 18" (about 15 degree downward). I covered tank glass with black plastics, and it recovered two months later. Then I moved those plastics, it started DE again, and forced me to cover the tank since then.
It's 20" when it passed away during a power down accident.