Who uses carbon, gfo, etc?

[Nanook]

I'm thinking carbon and gfo are causing issues with my sps. Just curious for the hardcore acropora growers if they're using these.

 

[oshanickreef]

Who uses carbon, gfo, etc?

I use 5 tsp of carbon and I use 1/3 recommended dose of gfo in a reactor and I turn the flow to a trickle. It def affects my corals if I let my nutrients get to zero.


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[Lance A. Lot]

I'm not a "hard core" acro guy but I don't use GFO much at all anymore. If I have to do anything I use about 3-5 drops of lanthanum chloride over 2 or 3 days maybe once every [other] month.
Carbon I use sparingly. Maybe I change it out every other month. The reactor/amount I use is also undersized for the system.

 

[Baxterdawg1974]

I stopped using GFO 4 months ago and am much more stable with my phos levels. Carbon i use sparingly and low flow just to remove oxidized yellow pigments in the water


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[clevername]

Iv run Phosgaurd which is aluminum based and i SWEAR is has almost killed some soft coral. Did a decent amount of searching and only a couple people have this experience. I run GFO now only every other month just to make sure everything is zero.

I have done experiments where i ran the Sechems Phosgaurd and within a couple days the soft coral will shrivel up.

At some point i need to sell this stuff i have a couple of canisters brand new

 

[Nanook]

Rinse it thoroughly first, then don’t tumble it. I’ve used it for 15 years with softies and never had problems.

 

[Pife]

Around a quarter cup of gfo and 1/4 cup of carbon and barely have water trickling through it. I typically change it out every 6 months or so.

 

[Nanook]

My phosphate is slowly increasing without GFO.

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