Referred to as a microalgae, brown or golden algae is actually not an algae at all, but diatoms. What you are actually seeing in your tank are diatom skeletons, all linked together. It can appear as a simple dusting on the tank walls and substrate surfaces, or it can turn into a massive growth that covers just about everything in the tank. This type of algae outbreak typically occurs when a tank is just completing or has finished
the nitrogen cycling process,
I had to look it up

I had it/them once before and Tommy Gunn saved my fish, I knew I had to keep a closer eye on a smaller tank and I was too busy with big tank. cleaned of the brown algae/diatoms, did big w/c and it/they were gone, now they are back. tank is 6 months old.
Ill try the bleach thing, Im good at rinsing, Im a home health care nurse and I take care of babies on Vents, and rinsing the equipment is very very important since babies cant tell you they are burning in the airway when disinfectant is not rinsed out properly.
tx for the suggest.
