low alkalinity

[makana]

Sorry I was a little deffensive the other day. A brown tank wasn't the Christmas present I was hoping for.

The lid is plexiglass that I cut to fit. There is a small squre at the back that I cut out to make room for the heater and cords. If I put it back on I will have to cut a hole now for the skimmer so it will not really be sealed.

I've got a koralia 1 power head and it keeps the surface fairly rippled. And now with the skimmer return that should be good. My PH hasn't improved any so I'm doubting it droped due to CO2 now.

I found a small dead crab that may have caused the spike. Or the water changed caused the spike and that killed the crab. I had no idea there was a crab in there.

I'd like to keep the lid but I'm not really sure if it will be a problem. I read that they can trap CO2 that is escaping from the tank and then there is no fresh air under the lid for gas exchange.