I have a thought or two. If your live animals are OK, why don't you ease up for a week or so.
That is, from the 21st to the 27th, you have been changing the conditions of your system what seems like several times a day and looking for results w/in 24 hours.
I don't know how accurate that observation is, but it that is what it looks like.
You will not see overnight results, so just relax and fix one problem at a time. Chances are, you will fix many problems if you target your energy on the most likely.
So, think, what could be causing an increase in algae? Not silica (sand), but phosphates and nitrogen-containing compounds...Nitrates, nitrites and ammonia. These chemicals promote algae and plant growth. How to get rid of them...water changes with SW
made with Distilled (or RO
) water, addition of live rock and/or a good filter/skimmer. But every time you make huge changes to your system, your system needs time to adjust. Pull out all of the "algae food" and the algae will die, rot, and pollute your system to some extent. Your luck is that ammonia has stayed low up to now. Have a sensitive nose? Keep sniffing! You may be able to smell it.
The main message...I believe all of these guys are on target. But you need to be a little more patient, the bacteria you need tons of don't grow overnight.
But, come to think of it, I did see some bacterial additive of some sort at my LFS
. That may help to speed up the process.
I hope this helps.