Help ID My latest issue on the sand

[jlauck]

Timelime:

- Started with dirty frags from a frag swap
- Ended up with Bryopsis, and a nasty case of GHA
- Lots of manual removal
- Ended up doing two rounds of Fluconazole. GHA cleared up
- Massive Cyanobacteria outbreak
- Lots of manual removal
- Ended up dosing Chemi Clean
- Cyano cleared up in two days.

Now (tank is 11 months old)

It's only on the sand, and it appears to be photosynthetic and clears up at night.
I initially thought I didn't get all the cyano, so I dosed some more chemiclean. That does not appear to be clearing it up.

Current parameters:
Salinity: 1.026
Temperature: 78°F
PH: 8.0-8.1
Nitrate: 5.4
Phosphate: 0.06
Alk: 7.9
Ca: 425

 

[MaxTremors]

It’s either diatoms (unlikely in a tank as old as yours unless you’re using tap water) or dinos (most likely). You need to ID which type to form a plan of attack. Get a cheap microscope and Google or search here to ID what you have and then go from there.

 

[jlauck]

My son's microscope left much to be desired, but hopefully it's good enough for an ID.