Hello everyone! Just wanted a quick checkup on my new 75gal aquarium. It's been up and running for approximately 6 weeks. I use ro/di water and reef crystals salt. I only have 2 small black and white clowns in the tank that up until today seemed perfectly happy. When I went to feed them today I couldn't find one of them, thought he was hiding but eventually found him on the carpet. As it's my first fish loss just wanted to see if I had done something wrong? I will definitely make some sort of screen lid. Didnt realize clowns were jumpers. I haven't had the lights on yet following BRS 2 month initial dark recommendation. Below are my parameter's. The only big variable was temp last night. It is just starting to cool off and had our first sub 32*F night last night. The tank temp was 74.1* this AM, normally around 78*. I have two 150w heaters in the sump. The ambient temp in the office got down to about 57*. Will keep it above 60* and look into adding a third 150w heater. Any other recommendations? Can I add another clown in there or should I wait till this one gets bigger and try to add a smaller one later? Temp 74.1*, Salinity 1.0265, PH 8.2, Amm.0, Nitrite 0, Nitrate 5.

