Originally Posted by esshup
[quote=nvcdl][quote=ewest]
Check alkalinity when the bloom goes away and if it is still over 40 ppm, then and only then add more fertilizer. You might not need to add any more. I'd keep the bloom going, but be very careful with the fertilizer - it's a lot easier to add more than to take some out.

Yup - I went overboard with fertilizer last year trying to get a bloom and I believe it was reason the fish got fungus.