I know there are other forms that debate this but had to ask. I have a favia and some acans that are receding and refusing to open up. I have been playing with lights for months trying to get the leds dialed in so have been thinking its the issue..... until last night I tested everything and alk, calc, mag and phosphates where all where I expected them to be (good range) but nitrate was 100+ using a salifert test kit. The kit is 4 months expired so I don't know to trust it or not but I did 3 test and all bright pink. Did a quick 5 gallon water change and plan to do 10 gallons tonight. I am pending a ATI water test (been almost 2 weeks since I sent) so will see what it says. Hit me though if the high nitrate is the issue? The corals in question are also fairly new. They where dipped and watched for a week and I even re dipped in iodine incase of infection.
incase it helps the tank is 140 gal, 27 in tall. my lights are about 10 in from water surface and I just increased the LEDs power to 60% max for 6 hours on all the blue channels, white goes to 25% max as I prefer bluer look. I had them lower powered before and discovered I was way to low on power for a long enough period of time. I am still not sure if I have them powered up enough or not enough. they are the reefbreeder V2s. The corals in question are all within 1 in off the sandbed on rocks.
incase it helps the tank is 140 gal, 27 in tall. my lights are about 10 in from water surface and I just increased the LEDs power to 60% max for 6 hours on all the blue channels, white goes to 25% max as I prefer bluer look. I had them lower powered before and discovered I was way to low on power for a long enough period of time. I am still not sure if I have them powered up enough or not enough. they are the reefbreeder V2s. The corals in question are all within 1 in off the sandbed on rocks.