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Old 01/17/2020, 02:10 AM   #1
fishyfish22
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red sea pro magnesium precision

So I'm testing magnesium with a fresh red sea pro test kit...
I've spent the last night testing repeatedly, each time the same.

I've been using the SR Aquaristik magnetic stirrer, so it's not a matter of me not stirring enough

rinsing with RODI water between each round

also tested with a different red sea pro kit, the trace elements

so far i've gotten 1200, 1240, 1280, 1320, 1360, 1440, 1400

i'm a quarter through a bottle of the C reagent, and I have no idea where I'm going wrong. this is from two red sea pro test kits, and the lack of precision is insane

anyone know what's up?


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Old 01/17/2020, 05:17 PM   #2
Vinny Kreyling
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You are drying the stirrer between tests?
I am using a plastic card to level any spoon of reagent to keep that element very close each time I use it.


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Old 01/17/2020, 11:18 PM   #3
bertoni
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I haven't used that kit, but there might be an issue with the speed of the reaction. Do they specify a waiting time between drops for the final titration?


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Old 01/17/2020, 11:27 PM   #4
fishyfish22
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Quote:
Originally Posted by Vinny Kreyling View Post
You are drying the stirrer between tests?
I am using a plastic card to level any spoon of reagent to keep that element very close each time I use it.
I do both. I clean and dry the stirrer thoroughly in between every test. and I do use a card to level out the poweder


Quote:
Originally Posted by bertoni View Post
I haven't used that kit, but there might be an issue with the speed of the reaction. Do they specify a waiting time between drops for the final titration?
nope. If anything, once it turns blue there is a chance for it to go back to purple if it sits for too long. I'm just going to try salifert this is too much stress


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two fish are in a tank, one says you man the guns, i'll drive.

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Old 01/18/2020, 10:40 PM   #5
bertoni
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The Salifert always worked for me.


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