Good feedback; thanks for the ideas. I will try blocking the sunlight with a canopy tent for a couple of days and also the barley powder. I have already put 6 pads in the water; but I was not aware of the time factor for them to be effective. I will also rig a fliter pad under the outlets; I originally had one under the intakes in the sump, but it was clogged within the hour and not practical as I am not home due to work, etc. in order to change it out. I may have to rig a setup that once one pad is clogged the overflow feeds a 2nd pad and so on...
a bit of bad news; I lost one of my plecos today... he was stuck to the intake
I have no idea...I just checked the parameters the day before; everything was o ppm, but the water was alkaline, around 8-even so they are used to slightly alkaline water.
I have been using Algae fix for the bloom prob, but I don't think that is the cause as I have used it before with no problems. He was well fed, no sucked in stomach; a bit plump as a matter of fact. I am gonna have to find the other plec and see how he is doing...