Phosphate Meter for SPS

[Hampton]

Which is the best for the money that gives you the precision you need?

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[BfishLpond78]

I have been pretty satisfied with the Hanna Checkers

 

[pickupman66]

Hands down, HANNA METER.

 

[Hampton]

They make three as far as I can tell. Are you using low range or ultra low range?

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[Reefer1225]

+1 Hanna UL Phosphorus (736) - reads in ppb, so u have to do some math to get ppm

 

[jservedio]

Make sure you get the HI 736 and NOT the HI 713. The 713 reads in PPM and is NOT useful at all in a SPS system. Unfortunately, most places sell the HI 713 model (like BRS and Marine Depot).

If the model says +/- 0.04ppm it is the WRONG ONE! You want the one that says +/- 5ppb. They are the same color and the only difference is that the correct one says "PPB" above the screen and the wrong one says "PPM".

They are the exact same price. I don't know why any marine specialty store is even selling HI 713 since it is useless. HI 736 goes all the way up to 0.2ppm so I don't know why you would need the other one... if it is above that who cares what the number is - your f*%$ed anyway...

 

[Dashiki]

I have the wrong test!

News to me this should be a sticky.

I always wondered how to get them low when the test accuracy was outside of what we need the phos to be below

 

[Chameleon]

Make sure you get the HI 736 and NOT the HI 713. The 713 reads in PPM and is NOT useful at all in a SPS system. Unfortunately, most places sell the HI 713 model (like BRS and Marine Depot).

If the model says +/- 0.04ppm it is the WRONG ONE! You want the one that says +/- 5ppb. They are the same color and the only difference is that the correct one says "PPB" above the screen and the wrong one says "PPM".
They are the exact same price. I don't know why any marine specialty store is even selling HI 713 since it is useless. HI 736 goes all the way up to 0.2ppm so I don't know why you would need the other one... if it is above that who cares what the number is - your f*%$ed anyway...

I respectfully disagree here. The 713 is great for an SPS tank. It gets you in the ball park of where you want to be. If it read 0.00 or close to that value you know you are on target. If its reading over 0.05 or closer to 0.1 you know you may want to bring them down. It is a very useful tool and I know of many satisfied customers including myself. Is the 736 more accurate? Perhaps, but I dont think that level of accuracy is required or needed to successfully run an SPS system. If you feel like converting every time you do a measure than the 736 is for you. If however you just want to make sure you levels are acceptable for SPS and dont want to be bothered with converting the 713 is a fine choice.

 

[Hampton]

Converting is like moving the decimal over 3 places, right? I mean, its not like bytes to gigs or something, is it?

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[Hampton]

I can see both sides, except, with phosban and the "new" drops, isn't it possible to read 0 ppm and not know that you are actually too low on PO4's?

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[Bustyraker]

I have Red Sea test kits for p04 no3, alk cal and mag and I love them. I've use salifert in the past and the Red Sea test kits are great, they also sell refill kits which saves a few bucks.

 

[Hampton]

I have Red Sea test kits for p04 no3, alk cal and mag and I love them. I've use salifert in the past and the Red Sea test kits are great, they also sell refill kits which saves a few bucks.

Good info, thanks.

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[Velodog2]

Just got the Hanna 736. First thing I notice is that they only give you reagent for six tests. Not used to having my first thought be I have to order more reagent when opening a new test kit. But I like the digital readout instead of reading a danged color chart.

They also say zip about interpreting results. I will check out their site.

 

[childress5tyler]

Make sure you get the HI 736 and NOT the HI 713. The 713 reads in PPM and is NOT useful at all in a SPS system. Unfortunately, most places sell the HI 713 model (like BRS and Marine Depot).

If the model says +/- 0.04ppm it is the WRONG ONE! You want the one that says +/- 5ppb. They are the same color and the only difference is that the correct one says "PPB" above the screen and the wrong one says "PPM".

They are the exact same price. I don't know why any marine specialty store is even selling HI 713 since it is useless. HI 736 goes all the way up to 0.2ppm so I don't know why you would need the other one... if it is above that who cares what the number is - your f*%$ed anyway...

Premium Aquatics sells the ultra low ones

 

[Velodog2]

The other difference is that 713 apparently reads phosphate and 736 reads phosphorous? There is little to nothing from Hanna to explain why and how to convert back and forth. Since it doesn't say ppm-P I am assuming that it is reading by weight, so I think the conversion factor is 3.1. Too many assumptions, not enough clarity.

 

[Peterock]

I use the Low range one and its pretty sweet. Tough to get that white box open though. Who desinged that?

 

[Chameleon]

Converting is like moving the decimal over 3 places, right? I mean, its not like bytes to gigs or something, is it?

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nope one reads in phosphorus and the other phosphates...there is more too it then that, but i dont remember

 

[glb]

nope one reads in phosphorus and the other phosphates...there is more too it then that, but i dont remember

Do you multiply by 3 and move over two decimal places? I can't remember the exact formula but it's two steps.

 

[Velodog2]

The other difference is that 713 apparently reads phosphate and 736 reads phosphorous? There is little to nothing from Hanna to explain why and how to convert back and forth. Since it doesn't say ppm-P I am assuming that it is reading by weight, so I think the conversion factor is 3.1. Too many assumptions, not enough clarity.

Quoting myself ... Lolz

Yes you multiply by 3.1 to go from phosphorous to phosphate (by wt, basically tacking on the weight of the oxygen atoms), then divide by 1000 (move decimal 3 places to the left) to go from ppb to ppm. So a reading of 10 ppb phosphate from the Hanna 736 would equate to 0.031 ppm phosphorous.

 

[Hampton]

Quoting myself ... Lolz

Yes you multiply by 3.1 to go from phosphorous to phosphate (by wt, basically tacking on the weight of the oxygen atoms), then divide by 1000 (move decimal 3 places to the left) to go from ppb to ppm. So a reading of 10 ppb phosphate from the Hanna 736 would equate to 0.031 ppm phosphorous.

Great info!

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