What would you recommend dosing, if anything?

[TCoach]

If the phosphate is really 2+ ppm, I'd focus on getting that down.

What is the best way to safely do this? I was hoping a chaeto refugium and the bio pellet reactor would work. However, they have both been running since ~6/1 w/o much of a difference.

I basically just feed LRS Reef Frenzy and occasional sheet of Nori.

 

[Screwgunner]

Give it time. Nothing in this hobby is fast.

 

[Screwgunner]

Bio pellets will drop your nitrates not so much phosphate .but refugium will.

 

[Spieg]

Lanthanum Chloride Is a pretty simple/controllable method for dropping PO4

 

[Screwgunner]

You have to run Linthicum to your skimmer or through a micron sock.

 

[Randy Holmes-Farley Verified Community Expert]

While I'm not a big fan of lanthanum, it may be the best bet for phosphate that high. Better options (IMO) will be very expensive (e.g., GFO).

Read up on how to use it best.

 

[TCoach]

If the phosphate is really 2+ ppm, I'd focus on getting that down.

OK, I picked up some GFO from the Marine Depot clearance. Given my tank is ~100 Gal total volume, how much would you recommend? Given the I structuons call for 1 cup, I’m thinking 1/4 cup? Want to reduce them slowly so I limit stress on the corals.

I have a Phosban 150 reactor I can use with the GFO.

 

[TCoach]

Ok, set the reactor up last night with 1/4 cup (35 g) of GFO. This morning test show PO4 dropped from 2.1 ppm to 1.3 ppm. Wow!