Thread: Preparing Rock
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Unread 01/31/2018, 02:09 PM   #41
CRJ
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Join Date: Aug 2012
Location: Ontario Canada
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Quote:
Originally Posted by choss View Post
Second test today and its down to .03. Is it possible the rock is that clean at this point that I can safely add it to the tank?
I am going through the same process. What I would do is remove the GFO and see if it creeps back up. Goal is to get it to 0 and for it to stay there without gfo. I will be testing every 3 days on mine to watch it for a rise, at which point I will start GFO, and once I see it back to 0 and stay there I will remove the gfo and check it again a few days later to see if it stayed at 0. if it did, into the tank it goes. if it doesnt, more gfo and retry in a week.

also, whats more important than phosphate is ammonia. if your bucket shows no ammonia or nitrite and only nitrates, it would be safe to add as its showing all has died off and decayed.


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