Test Reagent Shelf Life

[shawes]

I know that the Dpd powder is supposed to be replaced at the beginning of the season (does it really?) But what about the rest of the stuff?

Also, does water temp affect the results?

 

[mknauss]

All test reagents from TFTestkits are guaranteed for a year. The DPD powder can be effected by moisture so it must be kept in a dry, cool place or it can turn dark/purple and get clumpy. At that point it needs to be replaced.
Very low water temperature (40's) can effect the CYA test.

 

[shawes]

Thanks!!!

 

[shawes]

All test reagents from TFTestkits are guaranteed for a year. The DPD powder can be effected by moisture so it must be kept in a dry, cool place or it can turn dark/purple and get clumpy. At that point it needs to be replaced.
Very low water temperature (40's) can effect the CYA test.

Thank you very much!