This morning I added 3 heaping spoonfuls to the filter sock in the sump, removed cyanobacteria from half the glass of the refugium, and pulled some cyano sheets off the gravel. It should be interesting to see if there is a significant difference.
I also did a slight gravel vac on about 1/3 of the main tank.
None of the fish have shown any sign of stress so far, and the plants seem unaffected in any negative way.
The entire system is about 300 gallons.
stock include in the 100 gal main tank
5 xCichlasoma ornatum
5 Guianacara owroewefi
a small belly crawler pike or 2
3 lemon tetras
and a bristlenose pleco
Plants are a few Vallisneria americana, and some floaters (I believe Cabomba carolina)
in the same line
a 60 gal tank with sub-adults of
6 Gymnogeophagus balzani
5 Australoheros red ceibal
10 Corydorus erhardti
3 adult Xenoteca eiseni
an adult pleco
and a 75 gal with
5 sub adult Tomocichla seiboldi
few floating plants
log from previous pics
main tank