[mott]

I had ASII when it first came out and it did turn to mush within weeks now I only use ASI, I don't care if they fixed the problem or not I have fantastic results with ASI.

I had no tannins others talk about but I did have massive ammo readings the first few weeks with a mature filter.
My advice would be to go with ASI no need for powersand or other additives IMO. Stuff the tank with as many plants as you can, don't dose for two weeks then add fish after the tank has cycled.
Adding old tank water will do nothing for your cycle.