aquaknight
Active Member
Awesome new fish GT! The Bluejaw looks great. Big fan of the skunk clowns. Really underappreciated clowns, all the intelligence of larger clowns, but as peaceful, or even more so then perculas/ocells.
Originally Posted by sean48183
http:///forum/post/2893964
Absolutely ph drops when your lights go out. Little experiment: Leave your fuge light off and test your ph after the lights have been off for 4 hours. Ph will have dropped to around 7.8 I'm guessing. When photosynthesizing algae and corals release O2. When they close up they release carbon dioxide.
That is absolutely correct. Corals, algae, and other microorganisms start to consume CO2 with the lights on and release O2 into the water, raising pH. Running the refugium light on an opposite lighting schedule will help keep levels balanced. A good "swing range" to aim for is .2, ideally 8.1-8.3.
Originally Posted by sean48183
http:///forum/post/2893964
Absolutely ph drops when your lights go out. Little experiment: Leave your fuge light off and test your ph after the lights have been off for 4 hours. Ph will have dropped to around 7.8 I'm guessing. When photosynthesizing algae and corals release O2. When they close up they release carbon dioxide.
That is absolutely correct. Corals, algae, and other microorganisms start to consume CO2 with the lights on and release O2 into the water, raising pH. Running the refugium light on an opposite lighting schedule will help keep levels balanced. A good "swing range" to aim for is .2, ideally 8.1-8.3.