Calcium testing with hanna checker

[BaaMNYC]

What water do you use when testing calcium? Directions state to fill to 10ml after filling it with .1ml of the liquid regent. I mistakenly always used rodi water that my 3 stage makes. Am I the only one that made this mistake?

 

[reefman]

suppose to use Deionized water like this

Deionized water (1G) - HI70436

Deionized water (1G) - HI70436 is premium quality deionized water for you research needs.

www.hannainst.com

but i think ro/di is close enough

 

[BigA-quariums]

Correct me if I’m wrong but isn’t that the same water coming out of our rodi systems, from my understanding we use the pre filters to clean-up tap water to make it more pure about 90%(so the resin doesn’t deplete fast) and the di resin does the rest. Without the pre filters we would be going through that resin in a few days if not hours. I’ve had to make a couple hundred gallons of deionized water for work and it was just a huge cylinder with di resin.

 

[BaaMNYC]

Correct me if I’m wrong but isn’t that the same water coming out of our rodi systems, from my understanding we use the pre filters to clean-up tap water to make it more pure about 90%(so the resin doesn’t deplete fast) and the di resin does the rest. Without the pre filters we would be going through that resin in a few days if not hours. I’ve had to make a couple hundred gallons of deionized water for work and it was just a huge cylinder with di resin.

According to neptune rep. We were trouble shooting my trident. Calcium goes thru the filters in an rodi system. I was told to get steam distilled water.

 

[FMF0331]

$21.00 for gallon of HANNA DEIONIZED WATER

That's a case of beer for me.
I'll stick to Salifert Test kit

 

[BaaMNYC]

$21.00 for gallon of HANNA DEIONIZED WATER

That's a case of beer for me.
I'll stick to Salifert Test kit

I bought distilled water at cvs for $2. But I like your beer idea

 

[radiata]

I use distilled water too.