I am unfamiliar with the various algae types but if I had to guess I
would say string. I notice that it floats to the top during the day
and, when the hyancinth aren't stuck in it, the skimmer will swallow it
up. I will try the potash, thanks!

My fish will eat it up (provided they find it) in about 2-3 minutes.
They've pretty much given up on the shyness thing. I'm hoping we'll
see some babies in the spring. Actually the 20 is 19 since one died a
few days ago-- a shy small platinum that never hung with the group and
never ate in the frenzy :-(

I am a bit concerned if the filtration system is doing it's job given
the quality of the water. I went with this system after a bit of
research and have been disappointed with the results so far.