Phospate Hanna Checker

DB9181

DB9181

New member
So I know that Hanna Checkers are suppose to be substantially better, but yesterday I got two very different readings from my tank 0.33 & 0.24 (yes... i know its high) - thats a 0.09 difference - so based on that span, i could test 0.00 or 0.09 - I feel thats way to broad.

Only thing I can think of is that I didn't get all the powder in one of the times or at most there was a 1mL difference.

I usually fill both vials with SW and add the powder to one and start shaking while the other vial is used to zero the meter, etc. I make sure to try and get the vials as clean as possible before placing them into the checker.

I think the issue is slightly different amounts of powder added...? I do my best to get all of it in the vial but thats easier said than done ...

Any experiences / suggestions?
 
I used to do the same as you,and was getting different results too. I got a reply from Hanna some time ago to only use the same vial for testing, as the clarity of glass could be different from vial to vial.
 
fwadiver said:
get a low range ppb one
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ppb...?

MMreef said:
I used to do the same as you,and was getting different results too. I got a reply from Hanna some time ago to only use the same vial for testing, as the clarity of glass could be different from vial to vial.
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Ahh gotcha, maybe thats it... then you gotta be really fast since your suppose to shake for 2:00 mins, which barely leaves you time to add the powder (without missing) before the checker turns itself off.
 
just stop treating when you get consistanly 0.00. i have one and i quit testing, i just dose as much vinegar in my tank as i can without growing booger bacteria.
 
skunkmere said:
just stop treating when you get consistanly 0.00. i have one and i quit testing, i just dose as much vinegar in my tank as i can without growing booger bacteria.
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Maybe be alil while still i get it down ... plus w/ my stock i dont want 0.00 lol but i dont want to drop its 0.30 overnight either.
 
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