I think B-ionic is meant to put into salt water? Maybe it makes no difference, but you have to dose one part, then wait a bit, then dose the second part. I guess adding them both at the same time makes it less effective, or useless.
For coralline, I noticed this just recently...I changed my MH bulbs from 10K to 12K in spectrum and now my tank is purpling up (the plastic overflow is now half covered with coralline, whereas for the past year or so with the 10K lights it had only a spot or two!)
Maybe it's just coincidental. I'm just observing, not experimenting.
What I KNOW works pretty well is GOOD FLOW! My prizm skimmer, which I used on my old 10g nano tank, had two bits of plastic dipped into the water, but one piece was part of the overflowing return from the skimmer. That part was completely covered in coralline, but the part right next to it (actually, the same piece of plastic, but divided with a vertical piece) had very little on it! Also notice that your pumps intake and outlet have the most coralline on them!
V