kissman
Active member
Which Green one? ULR 736, the 713? I think all the PO4 are Green
Hanna Checkers
- Thread starter tommyz44
- Start date
Which Green one? ULR 736, the 713? I think all the PO4 are Green
wesleyforbes2
New member
I tried three of the ones that came with it. Then bought a new box of them at my LFS and still got 0.0!
kissman
Active member
Now that I am not on my phone I can see you have the 713 which reads in ppm. If I remember correctly that reads at a variance of +/- .5. It is possible that you are always getting 0.0 because the PO4 is that low. To get a more accurate reading if you know anybody in your area that has and might let you borrow the 736 which reads in ppb that will give you a more accurate reading.
wesleyforbes2
New member
Wow, well how would one know about the different models? I just ordered from Marinedepot. So my test kit is irrelevant? I bought it to get accurate measurement. Did I waste my money, what now?
kissman
Active member
I don't think you wasted your money its just not as accurate. Anytime I am going to buy something I research I almost bought the same Hanna Checker but first I came here to RC and did some searching and reading on them and that's when I found out about the Ultra Low Range PO4 Meter.
wesleyforbes2
New member
Dang! So it's either spend more money or wait for my P04 to go up that this one would read? That sucks!
wesleyforbes2
New member
Thanks guys!
wesleyforbes2
New member
Oh, what's the acceptable range?
brizhound
New member
You didn't waste your money. How does your tank look? if everything looks good and you're getting a 0.0 reading then you're fine. Yes it can be +- 5ppm but realistically you can judge this just by observing your tank. Do you run any GFO?
wesleyforbes2
New member
I did until I started running biopellets. My tank looks good now, it is only 5 months old so I just want to be able to keep on eye on the levels coralline is growing so I guess that's a good sign, thanks.
brizhound
New member
Yep it sounds like you are doing good. It took me about 4 months of very heavy feeding to get my Po4 up and I didn't run any media. So a tank at 5 months running pellets without po4 is normal. Just keep up on testing. Don't sweat trying to reach a certain number on a test kit. 0 is fine.
tommyz44
New member
If you are seeing .04 and less your doing pretty good. If you had .1 phos, trust me you would see it. why is it you think you do not have 0?
http://www.bulkreefsupply.com/hanna-checker-phosphate-colorimeter.html
•Range: 0.00 to 2.50 ppm (mg/L)
•Resolution: 0.01 ppm (mg/L)
•Precision: ±0.04 ppm (mg/L) ±4% of reading @ 25°C
•Light Source: LED @ 525 nm
•Light Detector: Silicon photocell
•Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
•Battery Type: (1) 1.5V AAA
•Auto-off: After 2 minutes of non-use and after read
•Dimensions: 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5")
•Weight: 64 g (2.25 oz.)
•Method: Adaptation of Standard Method 4500-P E.
..
http://www.bulkreefsupply.com/hanna-checker-phosphate-colorimeter.html
•Range: 0.00 to 2.50 ppm (mg/L)
•Resolution: 0.01 ppm (mg/L)
•Precision: ±0.04 ppm (mg/L) ±4% of reading @ 25°C
•Light Source: LED @ 525 nm
•Light Detector: Silicon photocell
•Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
•Battery Type: (1) 1.5V AAA
•Auto-off: After 2 minutes of non-use and after read
•Dimensions: 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5")
•Weight: 64 g (2.25 oz.)
•Method: Adaptation of Standard Method 4500-P E.
..
wesleyforbes2
New member
I don't know, just seems to good to be true I guess.
