Ie Question.

[CBBP]

Well first off I was stupid and only gotr Potassium Nitrate and potassium Sulfate. Anyway, I want to grow big goldfish and to do so you need no nirtrAtes. I added in 1/4 tspoon this mornign and it raised the PPm of NitrAtes to 10 ppm.. now it is 0 again. How much should I add? to keep it happy?

also, what is the other fert I forgot to add?

 

[Themuleous]

If it was 10ppm in the morning, there is almost no way it would be 0 by the evening. Something else must be going on, you sure you're measureing it right?

You may also need potassium phosphate.

From what I understand goldfish are quite messy so you may not need to add NO3 or PO4 very much at all as you'll get lots of this from the fish.