Hey it’s been a bit since been on here but I’ve been curing some dry rock. Well trying. I had in tank did salinity and put rock in with pumps heaters.... well things seemed high on my readings. So pulled rock after watching a BRS video on curing with bleach acid. I didn’t do the acid but bleach for about a two weeks. Dechlorinized water... let sit for a few days. But back into tank with rodi water with correct salinity. So now I’ve check phosphorus with the Hanna ulr checker... this dang thing with reagent turned blue... called BRS for advice... the guy I spoke to had no idea or where to lead me... so to the point... Do any of y’all had this happen and give advice on remedy... I spoke to one guy in the middle of my bleach process and he suggested gfo. Not sure on how to or if to proceed this direction. Open to ideas. At this point nothing major has been lost but want this to be right. Thanks
Phosphorus turned blue
- Thread starter Apollomax
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ihavecrabs
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What did the hanna checker read on the "blue"? My guess is you are out of range (on the high end) but that is just a guess. I have never had mine change any color.
Yes the sample can change color. Blue to be exact. What this means is you have more than 100ppm. Normally reefers do not see this because we keep our tanks so clean. You will now have to get rid of the phosphorus via some means. Sounds like its in the rock. There are ways to fix that. LC is one way.
WHen mine was visibly blue, the 736 flashed '200' which means it's maxed out. 0.61 ppm po4 being the max reading of these units.
I just put some RowaPhos in an internal filter and let it run its course. LC would work too I'm sure.
I just put some RowaPhos in an internal filter and let it run its course. LC would work too I'm sure.
Fudsey
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Lanthanum Carbonate
Fudsey
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Opps, got the carbonate/chloride screwed up 
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Randy Holmes-Farley
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Hey randy I saw some other threads you have commented on... here’s my question.
Phosphorus was high 200ppb by Hanna checker. Spoke with them in it turning blueish purple. Said yes I’m maxed out. Still strange since the rock had been in a bleach soak for a week and half or so. And had been dechlorinized. So I took Hanna say change water out. Did that tested it yesterday. Had over 200ppb cause the dang checker was flashing now. Lol. So decide to check my ro water out of filter it’s 6ppb which is like .018ppm... so what have I done wrong in my process and how do I fix it? Thanks in advance Scott
