Weird question?

[greggnyce]

well, speaking of missing fish, i just had a cherub angel go m.i.a. its normally a very social fish i havent seen it at all, even during feeding. i do have a reef lobster could he be the culprit, even though he is supposed to be reef safe according to Marine Invertebrates?

Reef lobsters can kill fish and have, so can coral banded cleaner shrimp. I remeber an article on it I will see if I can find it.

 

[Awibrandy]

Salifert makes a test for dissolved oxygen levels if you want to determine the O2 amount in your tank.

Is there a lot of surface agitation in the display? Gaseous exchange takes place at the water's surface so water circulation itself doesn't have a huge impact. The greater the surface agitation the better the the gas exchange.

Hey, thanks Cowfish!!! I will certainly invest in the salifert test kit.
To answer your question on the surface agitation: All 4 of the Koralias as well as the loclines are pointed to the surface water. So yes, there is q whole lot of surface agitation. The only ph that is not pointed upwards is the tunze.
Once again, thank you very much!!!!!!!!!!!!!!!!!!