Phosphates .94

[xxkenny90xx]

Lanthanum Chloride is the way to go for lowering po4 that far. Just be careful not to go too fast if you have corals

 

[mdb_talon]

I would use Phosphat-E - Phosphate Remover or Phosphate Rx and drop them over a period of a few days.
Day 1 I would drop them by 0.31
Day 3 I would drop them by 0.31
Day 5 I would drop them by 0.21
maybe use gfo to bring down the 0.11 over 2 days. get them to 0.03 - 0.08

That is way too fast. Especially considering the impact lanthium chloride can have on kh. Whatever method you use you want to be reducing by less than .1 per day.

 

[Deezill]

Lanthanum Chloride is the way to go for lowering po4 that far. Just be careful not to go too fast if you have corals

Phosphate Rx is Lanthanum Chloride. make sure you have a filter sock and make sure you are skimming using the two chemicals.

 

[Deezill]

That is way too fast. Especially considering the impact lanthium chloride can have on kh. Whatever method you use you want to be reducing by less than .1 per day.

might be too fast but I have used that formula twice with no ill effects but all systems are different. I also run a Cal rx so my alk never really dips.

 

[Randy Holmes-Farley]

How often GFO be changed?

GFO with good flow in it will deplete in less than 24 h at that level, but you can measure the effluent from it and see.

 

[Randy Holmes-Farley]

Gfo needs changed when phosphates start rising again(generally a month or two).

It will be far, far faster to deplete than a month or two at very high phosphate.

 

[Sam22]

My phosphate reached about 0.4 until I realised it was that high with a Hanna checker I test everyday and change gfo every 5/6 days before it starts to climb again it’s and expensive way of keeping it down but mines now 0.03/0.05 with testing daily

 

[xabo]

I almost want to say that purple stuff looks like some type of cyano. I could be wrong. Coraline algae is not that thick and dark.

Some additional info I found: https://www.melevsreef.com/critter/red-coralline-algae