Hello reefing family— need some help with this one— this is regarding my red sea aquarium that’s been set up for about two years. For the last week or so the glass has been covered with this whitish film in areas . It does not wipe off with my Flipper, it has to be scraped off with the razor blade side and even then it’s very hard to get off. Once you scrape it and it starts to float away in the water it looks kind of powdery. The last day or two it has been returning very very quickly for example I scraped it off a few hours ago and I just looked at the tank and it’s back in many areas. I tried to capture it in the attached photo. The lines you see in it are probably from the scraper. Harder to get off then corraline and as I said does not wipe off like algae. I had first thought it was some type of precipitate from dosing but none of my numbers really seem out of whack. Has anyone Seen this before and if so what do I do about it?
Parameters
RODI water only
Temp 78
PH 8.4
Salinity 35
Alk 9.2
Calcium 430 (Alk and cal dosing controlled by Trident)
Mag 1337 per Trident
NO3 2ppm per Red Sea test kit
PO4 0ppm per Red Sea test kit
Fish and coral seem unaffected at this time.
#reefsquad
Parameters
RODI water only
Temp 78
PH 8.4
Salinity 35
Alk 9.2
Calcium 430 (Alk and cal dosing controlled by Trident)
Mag 1337 per Trident
NO3 2ppm per Red Sea test kit
PO4 0ppm per Red Sea test kit
Fish and coral seem unaffected at this time.
#reefsquad
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