Hanna phosphate ULR

[Cdime712]

I just recently purchased this test kit this test kit. Hanna HI774 Phosphate. I got a reading of .90 I need to know if this is to high. What ppm I need to have. I've been having some issues with algae. Please any suggestions or advice would be greatly appreciated.

 

[legrunt]

Very high. Look to 0.03 to 0.06...

 

[Mikedawg]

.90 is the top of the range it reads and is an unusually high value to register in a reef tank unless you are having significant water quality problems. I would try a few more tests, closely following directions to see if it is your error or Hanna's. One thing that I didn't do when I first got mine was to hold down/release the black button after 3 seconds to start the 3 minute countdown after I had added the reagent. This gave me the same reading of .90

Good luck.

 

[Reef - Tripp]

It also seems to me an error when performing the test, check the steps

 

[Cdime712]

.90 is the top of the range it reads and is an unusually high value to register in a reef tank unless you are having significant water quality problems. I would try a few more tests, closely following directions to see if it is your error or Hanna's. One thing that I didn't do when I first got mine was to hold down/release the black button after 3 seconds to start the 3 minute countdown after I had added the reagent. This gave me the same reading of .90

Good luck.

I follow direction as it was stated in even went on YouTube.

 

[Cdime712]

I follow direction as it was stated in even went on YouTube.

 

[Cdime712]

Very high. Look to 0.03 to 0.06...

 

[zukihara]

High!

 

[Mikedawg]

Then you probably want to research using GFO, Lanthanum Chloride, etc. to bring phosphate down. If it is this high, I don't think water changes will do much good.

 

[Cdime712]

.90 is the top of the range it reads and is an unusually high value to register in a reef tank unless you are having significant water quality problems. I would try a few more tests, closely following directions to see if it is your error or Hanna's. One thing that I didn't do when I first got mine was to hold down/release the black button after 3 seconds to start the 3 minute countdown after I had added the reagent. This gave me the same reading of .90

Good luck.

I add

.90 is the top of the range it reads and is an unusually high value to register in a reef tank unless you are having significant water quality problems. I would try a few more tests, closely following directions to see if it is your error or Hanna's. One thing that I didn't do when I first got mine was to hold down/release the black button after 3 seconds to start the 3 minute countdown after I had added the reagent. This gave me the same reading of .90

Good luck.

I add the water from my tank to the 10ml. Push the button and waited for the C1 to appear. Put the glass tube inside and push the button and waited for it to ask for C2. At at the powder shook for 3 minutes then held down the button for 2 seconds waiting for 3 minutes to complete. This is the reading I got twice.

 

[Cdime712]

Then you probably want to research using GFO, Lanthanum Chloride, etc. to bring it down. If it is this high, I don't think water changes will do much good.

Point to the site or where to get the info please.

 

[fisheriesdoc]

I add

I add the water from my tank to the 10ml. Push the button and waited for the C1 to appear. Put the glass tube inside and push the button and waited for it to ask for C2. At at the powder shook for 3 minutes then held down the button for 2 seconds waiting for 3 minutes to complete. This is the reading I got twice.

I think you are supposed to shake it for two minutes?

 

[Mikedawg]

If you use the term "lowering phosphate" in the search box at upper right corner of this site you'll find a wealth of research/discussion

 

[Cdime712]

I think you are supposed to shake it for two minutes?

Yes 2 min sorry

 

[Cdime712]

If you use the term "lowering phosphate" in the search box at upper right corner of this site you'll find a wealth of research/discussion

Had a question if you can please. ppm .90 . Do I have to do any math or is it the right reading for my phosphate.

 

[BostonReefer300]

I'd suggest diluting your sample and try again. Add 5mL of tank water and 5mL of RODI water. Do the rest of the test per the instructions. Whatever result you get, multiply by 2 to get the true value.

 

[Cdime712]

I'd suggest diluting your sample and try again. Add 5mL of tank water and 5mL of RODI water. Do the rest of the test per the instructions. Whatever result you get, multiply by 2 to get the true value.

Question on a Hanna test kit?

 

[BostonReefer300]

0.9 could be the correct level---but it could also be at the top end of detection and therefore a false reading. I don't have the Hanna instructions on me right now. That's why I'm suggesting doing a 50% dilution to double-check. You'll get a lot of different opinions on what the "right" level of phosphate should be. I'm no expert, but I'd suggest around 0.05 ppm. Problem with HI774 is that at the lower end of detection, the margin of error makes it hard to determine true values down that low. I went and bought the ultralow Phosphorus one (HI736) instead to solve that problem

 

[RuuToo]

Had a question if you can please. ppm .90 . Do I have to do any math or is it the right reading for my phosphate.

The phosphorus test is the one that needs to be calculated, not the phosphate ulr

 

[Cdime712]

The phosphorus test is the one that needs to be calculated, not the phosphate ulr