If you have things in a tank,

YOu don't need a humidifier.

What kind of fungus/mold are you getting? What color

Superthrive is not a fertilizer, it is more of a hormone. So, in theory, the hormones and vitamins are to make the roots larger, which will in turn make bigger plants.

I am currently working on a small expierement with:

1 tray: control
1 tray: miracid
1 tray: superthrive

The 2 trays that are receiving something 'other than water' are sprayed on the leaves only (foliar feeding ).

I have only been doing it for a couple of months.

I can say that I used some plants like looked like they were on their way out. They are all doing really well. Many new traps and new growth.

I would have tossed them out. But I thought that I would give them their 'last chance'.

Hope that helps