Quote:
Originally Posted by Samw
Again, died overnight. Both at the same time. DO level is always at its lowest at night when lights out after several hours. As I said before, strong flow does not equal high DO. Obviously, I don't know the setup and am just speculating, but the only way to know for sure what the DO levels are from 2am-6am is with a DO monitor/meter which almost no one uses. The sudden death overnight of both animals is a clue. Why always at night? DO levels fluctuate wildly from day to day, night to night. But the lowest levels are always at night after lights out for several hours and the levels each night are different. I've had my levels go from 125% saturation during the day to something like 35% at night even with skimmer on. Some nights I get 40%. Nowadays, I think I'm getting closer to 80% at night since I have no algae and deploy a UV sterilizer. There are countless things that affect DO.
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Ya, I don't know the system either. I do know he has a lot less algae, but a lot more coral. And his idea of strong flow might not be mine. Currently my bulbs are covered in salt from splashing, and they're a foot off the water. My flow heavily breaks the surface 24/7. Without a DO meter tho, no real way to tell what happens over night.