zdam20

I have chosen to use the pps classic system to run my new tank fertilizer regime. My question is at what time do I test the parameters of my tank? Do I do it befor I dose or after? Should I test at the end of the day or in the morning befor the lights go on? BTW, I've been dosing for 1 week and I can't believe the growth of the stem plants I've got it there.

ray-the-pilot

It doesn’t matter when you test. The amount of nutrients you add per dose is very low compared to the amounts you will find from your test. For example: after time you will find that NO3 is 12 ppm. Since you only add 1 ppm of NO3 per dose what you would find after dosing is 13 ppm a difference your test kit probably cannot detect anyway.

What ever you chose (i.e. before or after dosing) stick with it so you can get a good comparison over time.

zdam20

Thanks Ray.