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#1
02-20-2007, 05:15 AM
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Supposedly levels of PO4 above 0.015 ppm are bad and impede coral growth. High PO4 maybe the problem.
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300 gal starphire custom built in pentagon reef (+90 gal sump on Blue Line 100 HD return pump, 210lb LR, Euro-Reef RC250 skimmer, 2x400W MH, 2x28W compacts, 2xTurbelle classic 4002 pumps & Turbelle Stream 6100 on 7095 Multicontroller, running ZEOvit) Livestock Fish: damsels; sailfin, yellow, regal & naso tangs; ocellaris & tomato clowns; lyretail anthias; foxface lo; flame angelfish corals: a few 
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#2
02-20-2007, 05:21 AM
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Whatcha using for testing? I'm using Elos phosphate test kit. Unfortunately the levels are 0, 0.1, 0.25, and then up from there. So more less I need to get the test reading from the second-faintest hue-of-blue to the least-faint hue-of-blue without actually being perfectly clear. I hate these colour coded test kits, I wish there were more titration type tests (where you count the drops until a colour change ... far less subjective).
I'll have to dig through my drawer-o-testkits but I think I have some other older PO4 test kits, Seachem and Salifert, in there.. hoping between the 2 or 3 test kits I can worry less about guessing colours and feel better about my guesses of the results.. I'm terrible at comparing colours...
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-- Tony My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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#3
02-20-2007, 05:32 AM
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I am using the Salifert PO4 testkit. I totally agree that the colour coded test kits suck. I think the colorimetric meters are too $$ and only test a few things (PO4 not being one of them). There is a MERC Phosphate Test Kit ($79.95 at J&L). With the kit you can measure phosphate levels within the range of 0.14 – 0.008 (P) which equates to 0.43 – 0.023 (PO4 ). My goal is to get the PO4 levels down so the tube is clear which should indicate a PO4<0.015. Time will tell.
p.s. I did see refills for the MERC kit advertised on a CDN LFS website (not J&L) but can't remember which one.
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300 gal starphire custom built in pentagon reef (+90 gal sump on Blue Line 100 HD return pump, 210lb LR, Euro-Reef RC250 skimmer, 2x400W MH, 2x28W compacts, 2xTurbelle classic 4002 pumps & Turbelle Stream 6100 on 7095 Multicontroller, running ZEOvit) Livestock Fish: damsels; sailfin, yellow, regal & naso tangs; ocellaris & tomato clowns; lyretail anthias; foxface lo; flame angelfish corals: a few
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