Hanna checker 736 ULR

[Ojos22]

Hey guys,

I picked up a Hanna checker ulr and have tested my tank a couple of times and I want to make I am converting phosphorus to phosphate correctly.

I did a search of the forum and my Hanna checker is saying 36. I read you multiply that by 3.066 which would be 111 PPB then divide by 1000 to get to ppm which would still be .1103 ppm. Which is really high.

Can anyone with experience confirm I am doing the math right?

I have been struggling with hair algae and some cyano for months and my salifert phosphate test always reads zero or at least I can't see any blue coloring. If my phosphates are that high I have a real problem and my other methods of keeping phosphates down are not working

Thank you

 

[MacPhisto]

You're doing the math the right way.. And a Salifert Phosphate test is useless, i never saw a color change on that test!

 

[bertoni]

I agree that the math is fine. That level is rather high. I might look into using some GFO.

 

[Ojos22]

I had been vodka dosing and running bio pellets and still having issues. I just stopped both of those and switched to just rowaphos in a phosban 550. I haven't been cleaning out my sand and that is the only thing I can think of that is causing the high phosphate. I have crazy amounts of green hair algae and cyano bacteria.

I did about a 30% water change today including syphoning the sand bed. I will have to keep a close watch.

 

[bertoni]

Okay, I'd give the RowaPhos some time to work.

 

[Dan_P]

Hey guys,

I picked up a Hanna checker ulr and have tested my tank a couple of times and I want to make I am converting phosphorus to phosphate correctly.

I did a search of the forum and my Hanna checker is saying 36. I read you multiply that by 3.066 which would be 111 PPB then divide by 1000 to get to ppm which would still be .1103 ppm. Which is really high.

Can anyone with experience confirm I am doing the math right?

I have been struggling with hair algae and some cyano for months and my salifert phosphate test always reads zero or at least I can't see any blue coloring. If my phosphates are that high I have a real problem and my other methods of keeping phosphates down are not working

Thank you

The ULR checker is in ppb phosphorus, so, divide by 1000 to get ppm. To convert phosphorous to phosphate multilpy the ppm number by (95/31), that is mass ratio of phosphate to phosphorus.

The relationship between the concentration of phosphate and nuisance algae growth is poor because there are other sources of growth stimulating nutrients. It is good to keep phosphates down as a rough indication of water quality.

 

[das75]

I just printed a chart from Beananimal (here).

 

[bertoni]

Multiplying by 3 is more than close enough.