I have two 16 year old Synodontis Ocellifers in a 6 x 2 x 2 tanks

from the link you gave I can verify that my lazy flying foxes are the Crossocheilus siamensis, exactly as photographed in the Dennerle book. However I do have what appears to be a Epalzeorhynchus kalopterus and he seems to do more algae work than all the others. He's considerably darker and his head ...

dissolved oxygen meters are worthless, you might as well stick a thumb in the tank and measure the oxygen levels that way!! You can achieve oxygen saturation by having a thriving planted aquarium, and what happens is at the peak the plants will start "blubbling", the only drawback is your stocking ...

out of interest, how much did you pay for this? Not so long ago they were in the £300 - £400 mark!!

ben,

That's what I got: Crossocheilus siamensis, see the Dennerle book. And no, mine are not lawn movers, I've spoiled them rotten with all the nice frozen foods. I have also an unidentified flying fox that looks similar to the original and he seems to be doing a lot of algae eating.

I have a scobi in a 4 foot acrylic tank, well planted Dennerle system. He does do algae duties (probably better than my lazy flying foxes!!)

No, he does not scratch the acrylic, although you do see his teeth marks where he's scrapped off the algae