Interesting observation

[Charlie’s Frags]

I’ve always noticed that my po4 reads higher when my alk is higher. So I just did a little test. I ran my alk test on my trident
and tested Po4 with my hand ulr

Then I added 15mls of alk and redid both tests.

Test were done about 10 minutes apart and the only thing added was 15mls of alk and Po4 read 0.02 ppm higher.

 

[KrisReef]

I wonder if the dissolution of P increases with increased pH? I'm too lazy and chemistry fuzzy to look it up. I bet RHF knows off the top.

 

[Charlie’s Frags]

I wonder if the dissolution of P increases with increased pH? I'm too lazy and chemistry fuzzy to look it up. I bet RHF knows off the top.

I thought of a better way to test….but I’ll do it tomorrow. Sleepy time

 

[ScottB]

I vaguely recall some association between nitrate (or nitrification) and alkalinity, but not PO4. Curious to see what you come up with though.

+-.02 is the quoted error range on the ULR I think.

 

[Charlie’s Frags]

I vaguely recall some association between nitrate (or nitrification) and alkalinity, but not PO4. Curious to see what you come up with though.

+-.02 is the quoted error range on the ULR I think.

I knew someone would throw that out there bc I would do the same thing, but my alk swings 1-1.5 dKh daily and my po4 is always higher when my dKh is at its highest daily value. We’ll see later tonight.

 

[jda]

You could ask this in the chemistry forum and somebody will probably know. I doubt that there is that much P in your alk supplement, if any, but I guess that there could be a small trace. Kalk can precipitate po4 out of the water, but I have no idea what might raise this.

Which alk supplement are you using? Carbonate? Bicarbonate?

 

[Charlie’s Frags]

Never mind
Turns out it was just the margin of error
Carry on

 

[ScottB]

Never mind
Turns out it was just the margin of error
Carry on

Nothing to see here. Move along.

Dang it Charlie I lost the freebie CF New Release the other day and I want a refund!

The other pieces remain in good shape. I had moved them (within the same water system) from T5 to a T5/LED hybrid tank.

 

[Dom]

I was wondering if it could be a calibration error with the Hanna?

 

[Charlie’s Frags]

I was wondering if it could be a calibration error with the Hanna?

Nah
It was just an ignorant thought by me.

 

[Charlie’s Frags]

Nothing to see here. Move along.

Dang it Charlie I lost the freebie CF New Release the other day and I want a refund!

The other pieces remain in good shape. I had moved them (within the same water system) from T5 to a T5/LED hybrid tank.

Hit me up on the back line

 

[Dom]

Nah
It was just an ignorant thought by me.

Yikes... being a bit harsh on yourself...