Hairy brown algae, What is it?

[Exotrezy]

I do not know which specific organism that is, but in the case of green algae, which this may be, herbivores can be a better way to go than nutrient control.

No phos test kit even comes close to a Hanna phos checker. In my opinion, you shouldn’t even keep a reef if you can’t/won’t make that investment. It’s a priceless tool

I hear what you are saying but the Hanna is much easier to read than the Salifert.

The Salifert works okay if you use a second vial with unreacted water so you can see very small color changes by comparison.

At 0.10 ppm Phosphate it is an okay test to use - very difficult lower than that.

The salifert is better if you have silicates in the sample, Silica interferes with the Hanna much more strongly than Salifert.

Need to get at least Nitrate + Phosphate + Alkalinity testers. Phosphate at 10ppm is off the charts high. Phosphate should be at 0.05-0.10ppm at ideal parameters. Nitrate should be ~5-15 ppm. Alkalinity needs to be stable at 8-11dKh.

Remember - stability is WAY more important than chasing certain numbers.

Update: I scraped some of it off yesterday, not much but just a little bit. Woke up today to see that most of the one on the main big rock is gone and theres barely any left on the small rocks. Maybe they ran out of nutrients and ended up dying. Or maybe its my tiger conch that ate it all up since I did see him on the big rock yesterday night before turning the lights off. Either way, very good that most of it is leaving and disappearing. I will most likely scrub the remaining parts this weekend when doing a water change.

 

[Exotrezy]

Looks like hair algae

What is your phosphate and nitrate levels and what test kits are you using?

Update: I scraped some of it off yesterday, not much but just a little bit. Woke up today to see that most of the one on the main big rock is gone and theres barely any left on the small rocks. Maybe they ran out of nutrients and ended up dying. Or maybe its my tiger conch that ate it all up since I did see him on the big rock yesterday night before turning the lights off. Either way, very good that most of it is leaving and disappearing. I will most likely scrub the remaining parts this weekend when doing a water change.

 

[gbroadbridge]

Update: I scraped some of it off yesterday, not much but just a little bit. Woke up today to see that most of the one on the main big rock is gone and theres barely any left on the small rocks. Maybe they ran out of nutrients and ended up dying. Or maybe its my tiger conch that ate it all up since I did see him on the big rock yesterday night before turning the lights off. Either way, very good that most of it is leaving and disappearing. I will most likely scrub the remaining parts this weekend when doing a water change.

It's often one of those things that mysteriously disappears once the tank settles. Sometimes replaced by something else, so always stay alert :)

 

[Exotrezy]

It's often one of those things that mysteriously disappears once the tank settles. Sometimes replaced by something else, so always stay alert :)

Yup, I am making sure to keep track. I did have cyano start to come up about 2-3 weeks ago but it was like nothing I would blow it off and it was like maybe very small patches. Diatoms are still here but slowly going away.