I’m desperate! I have a 255lt tank and 100lt sump. I have a return pump 3000lph and a hang on Overflow box 2000 lph. I also have a Boyu In sump skimmer. One inch live sand, 15kg live rock and a small Refugium. 1 leather small and a purple mushroom. 3 Disp Anthias, 2 Chromis and a Lipstick Tank. Plus a few hermits and turbo's.The tank has been running for around 6 months and its driving me crazy. All my readings are spot on except for my Nitrate which is at 10. I’m using No-Pox 10ml daily. Issue 1. I’ve started noticing a white residue on the surface of the tank and on the front glass. It’s starting to stick to the heater in the main tank also. The sump is clear. I’ve had to clean the tank every day last week. When I do clean little white particles flood the tank. Issue 2. I do weekly clean ups and water change Purchase3d from my Marine shop and rinse the overflow, Pump and Skimmer. I also rinse the media in tank water. After I finish it takes a good 30 minutes to get the overflow and return pump synced even though I’ve not moved or removed anything. I almost threw in the towel tonight. It just seems like a constant battle with almost zero enjoyment. What am I doing so wrong? Please can anyone give my possible reasons and a few tips would be great to. Cheers.