Algea ID for newb please. 4 mo old tank

[zcapogna]

Team, looking for positive ID and treatment of attached.

Don't have a complicated system. Just fish and cleanup crew. Fluval 405 filter. Reading of ammonia and nitrite 0. Nitrate between 10 and 20ppm. Phosphate between 0 and .25ppm

Substrate is white aragonite.

Only 2 species in picture.

Brown stuff coats tank and easily brushes off.

Trying to determine if Diatom, Dino, or Cyano.

Using Fluval Marine light. Water temp 79/80F. Water Change 10% a week. 75 gallon tank. IO salt 1.021.

Looking for best advice to address.

Considering waiting out and adding more snails.

Thx!
Zac

 

[LiLinka]

looks like diatoms to me but pics are kind of blurry, I’d first recommend getting a more accurate test kit to properly test your water. 0 phosphate is a big difference from .25. I’d recommend getting a Hanna checker to easily and accurately test your water. If your phopshates are high then lower them using rowa or phosguard. It’s hard to gauge situation with unacurate test. Sorry for long message but I hope this helps, and good luck!