The allowable error rate for the Hanna phosphate ULR is +- .02 so both test kits are probably correct....or as close as you are going to get with hobby grade test kits. I just realized you are in Broadview Heights...right down the road lol.
Nice to meet ya
Yea
Sorry read that wrong my unit dose not timeout as in stop working while testing?
The unit shuts off after 2 minutes. I do the calibration then it takes like 3 minutes to use the reagent and shake the sample so the units shuts off. power saver or something
Mine dose not shut off untell 2 mins after I get my reading
This is for fish only phosphate reading. I would recommend buying the phosphorus ULR. I believe it is 736 model.
Wait what? I have the ulr phosphate hanna checker ur saying it the wroung test kit? For a reef
It’s low range…good enough for fish only system. For reef tank where the ideal phosphate is 0.04 ppm, it does not measure that low properly. It will always show as zero. Been there done that and that’s how I know. Here is the link to 736.
www.bulkreefsupply.com
I have this one https://www.hannainst.com/phosphate...C1OjwqSKS2rGTxsjaaRUaD3X8ctGivtAaAjS8EALw_wcBIt’s low range…good enough for fish only system. For reef tank where the ideal phosphate is 0.04 ppm, it does not measure that low properly. It will always show as zero. Been there done that and that’s how I know. Here is the link to 736.
do remember to convert from phosphorus to phosphate. I generally read 10 on 736 as good. Less than that is not good either. Anything above 30, time to check what’s causing the extra phosphate…
HI736-25 Phosphorus ULR Reagents - Marine Water
Phosphorus Ultra Low Range reagent refills for the easy to use, handheld Phosphorus ULR Colorimeter HI736 Hanna Checker HC - Marine Water. 25 packets of reagent Item #: HI 736 -25
hope that was helpful
That checker has a -/+ of .04 I believe so your tank could be at .04 but the reading could be showing zero, likewise the tank could be zero but your checker showing .04 so not great if you are aiming for .03 but you could aim for say .05 which would keep you in the safe zone, above zero and below .1, so you don’t ever hit zero po4 in your tank, many aim for under .1 so don’t think you have to hit .03.
My tank always reads 0.01 with my checker
Think I got my posts mixed up, you have the 736? The phosphorus checker, it has a -/+ of 10ppb which is .03 so is more than fine for your tank, just aim for .04 or above so you are always above zero.aiming for .04 means your tank could be anywhere from .01 to .07 if the reading is showing 0.04.
