How much GFO?

[EDJFA]

It's time to change my GFO. When I set it up, I just asked Lei how much to use and he gave me a bag full. Done.

But last night I bought a full container of it from him instead. It's the standard BRS GFO, not their high capacity.

Directions say 1 TBSP per 4 gallons. I have 250g, so that means 62.5 TBSP or 3.91 cups.

I'd say that's double what I used the first time. Should I stick with the original amount or just follow the directions? If I follow the directions, I'm not sure the small pump I'm using will work as well.

 

[Aqua Man 07]

how bad is your phosphate?

 

[Schplitter]

1 cup per 100 gaskins seems to work best for me BUT I think it depends on the amount of phosphate you are putting in. If you have issues go with 3 cups and watch your levels closely. If you are happy with your phosphate levels then go with 1-1.5 cups to maintain them and watch your levels closely. Adjust as needed.

 

[EDJFA]

I tested my phosphates this morning. API test says zero phosphates. I'm surprised by that. The last time I tested it was between .5 and 1ppm.

So, should I change the GFO yet? I has to have been 5-6 months since I started the reactor with this batch.

 

[Aqua Man 07]

Have someone test with a different test just to verify your reading. If it is 0 then I'd say if it ain't broke don't fix it. Lol or just run the same amount as your curently running.

 

[Vinny Kreyling]

To see if the gfo is still viable check it from the discharge line then compare to the tank, if it's the same or close it needs to be changed.