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I feel your pain! Following for useful suggestionsReturns every time I clean my sand within a hour
Calcium 450
Magnesium 1350
Alk 9.2
PH 8.2
NO3-4ppm
PO4-0.5ppm
Salinity 1.026
Temp 78
Tank is a Red Sea max s400and using 2 Gyre xf230 on 30% random , so I know I have plenty of flow, tank is 6 months oldWelcome to R2R and congrats on your first post. I wish it was on a different topic, but it is a start none the less. Be sure to start a build thread so we can see more about the tank and avoid the reptitive questions that will slow down you finding the answers in your journey
All that said, what size tank and what are you using for flow? I usually see this in newer tanks, but have had a couple issues with this in my established tank as well. What worked for me is a combination of time and elbow grease.
Suck it out with a siphon and replace the water (small water change). Keep the changes small as this will help prevent a large swing in perimeters. Add focused flow to the area. This is one of those things we have all had and typically found different causes or solutions, but i find it after something died i wasnt aware of and food buildup/lack of flow. I also started rinsing my food before feeding to avoid extra nutrients put into the system. The focused flow keeps things moving into the water column and, IMO, only using frozen foods that the fish eat before it hits the bottom. Pellets and what not can build up and cause little pockets of dead zones, that then turn into this cyano.
Siphoning does seem like a waste as it comes right back until the other things are corrected, but i always do it to keep the bacteria from spreading and impacting corals.
And it’s only on sand, rock work is clean ?Tank is a Red Sea max s400and using 2 Gyre xf230 on 30% random , so I know I have plenty of flow, tank is 6 months old
I am going through this myself. I even shut the lights off for two days. Sand bed looked a lot better, till I turned the lights back on. Now it’s all over the place again. I will checking in. To see if any more answers.