Hello, thanks for any help on this situation. This is my first tank and it has been going well for a while. I have not had great coral growth but have yet to lose a coral. However, I have been dealing with this algae outbreak recently and it's driving me crazy. I initially identified it as dinos as it was very stringy and had bubbles, however, I bought a microscope today, and I no longer feel confident with dinos... It looks like cyano and diatoms under the scope, but all the pictures online look nothing like my tank. Tank is about 5 months old. I am cleaning my glass every 2 days as it is quickly covered. Any advice or identification? Is this ugly stage? I dosed 0.01 phosphate as it was reading zero and I still thought it was dinos. Last tests where 2-4 nitrates 0 phosphate. Over the last couple of weeks I had really strange magnesium tests. At one point it dropped from 1200 to 920 over 2 weeks with water changes. I tested twice and tested fresh mix. I don't think it was a testing fluke. It's back up again after heavy dosing. 400 calcium 8.0 alkalinity. pH is around 8.15. sample was taken from the stringy parts. Dosing microbacte clean and 7 also dosing 1 ml red sea carbon n04 pox. 29 gallons but about 20 gallons total water volume.
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