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#1
10-06-2007, 04:40 AM
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I need help with measuring PO4
Looking for someone in the Calgary area to help me...
I need someone who has a Merck or D-D PO4 test kit, or a Hanna PO4 photometer to help me test my PO4 levels. Here's my issue ... I HAVE the Hanna PO4 photometer but I suspect it is defective as I cannot get any readings with any degree of consistency. Ie. the numbers are all over the map. For example, I just took three readings on the same tank water and got 0.12, 0.04, 0.26. Just to eliminate the possibility of user error, I need someone who can help me establish what my water PO4 really is. Anyone? Please?
__________________
-- 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
10-06-2007, 05:33 AM
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Awesome. It would be great to do a comparison because I feel like a blind guy trying to understand what an elephant looks like.
__________________
-- 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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#4
10-06-2007, 06:13 AM
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Ok word to the wise, I just got some help on RC and I'll share what I've learned ... the instructions just say "mix gently" and then put the sample in. My lesson learned is, mix gently for like 2-3 minutes and then still do the 3 minute timed read.
I had asked Hanna technical support whether there should be residual powder before the test, they said yes, but no, you don't want any. I thought that didn't make any sense but that's what's been having me chase my tail. If I let the reagent dissolve completely then I seem to get consistent results. (Yay!)
__________________
-- 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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#5
10-07-2007, 05:27 AM
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I just got my Hanna meter Friday. Love it already. I have been shaking the sample fairly vigerously for 60 sec and then testing and so far seems to work well.
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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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#6
10-07-2007, 06:41 AM
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Yeah ... see my problem was that not only do the instructions say "mix gently" (and not give any indication for how long), Hanna technical support themselves told me not to dissolve the sample.
 That advice was way off the mark, I should have trusted my instincts. Since last night I've done about 6 more tests and lo and behold .... consistent results. (Yay!)
__________________
-- 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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