Okay I need to use some GFO cuz my phosphates are a tad high and I’m getting a green hair algae outbreak. I asked deep dive to analyze my tank size (47 gal) and recent phosphate parameters test (0.2 ppm). it recommended I use 300g and that seems like an extremely high amount. I’m scared to crash my system. A BRS video says 1 Tbsp per 4 gallons and I’m thinking of even doing half that just to start gradually. Advice for GFO first timer?
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@arrik
202d
I bought it in bulk from LFS. I decided to go with just 3 tbsp. see where we land tomorrow.
@billy
202d
Nice. Also if you have a valve on your reactor you can play with the speed. Faster the water is moving the more it will strip phosphates
@FestiveTide65
202d
Good call starting slow with the GFO, especially since your phosphate isn’t crazy high. I’ve always had better results running a small amount and swapping it out more often instead of dumping a bunch in at once. Just keep an eye on your alk and coral polyp extension when you start since
@MaizeandBlue
201d
Whatever BRS says is what I do.
@MaizeandBlue
201d
Well, if you’re phosphates are 0.02 you don’t have a phosphate issue. Recommended is somewhere between .03 and .1 with the optimum being between .05-.06
@RusticBlossom39
201d
def start slow for sure
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What are the directions on the back? I also found when doing GFO that directions recommended way too much and my phosphates dropped too fast. .2ppm is not horrible. I’d start with 1/3 of what the packing recommends and you can always increase the amount based on testing after 24hrs