Hello! I recently had a brown algae issue in my 80 gallon, mainly on the plants. I reduced the ferts and such, but to no avail. Getting it off the glass was easy enough, but the plants looked absolutely horrible. So, I purchased 6 oto cats to take care of the problem. And take care of it they did. Within 3 days, the plants were back to their vibrant green and I could actually see the true colors of the rocks I put in. I watched the little suckers go to town and it was really cool to watch. They were especially industrious at night. I'd wake up the next morning and saw the fruits of their nocturnal labors. But now, they are slacking! They've been in for about 2 months. All 6 are still alive but I don't see them eat any algae at all now. They either attach themselves to the airlines of the bubble wands or the intakes of the filters. And there they sit, every day. They look healthy enough. Their dorsal fins are all upright and not clamped to their body and they all have the healthy oto cat pot belly. From what I've read, otos are consistent and reliable algae eaters and don't get lazy like flying foxes are known to do. So what's the deal? Has anybody else had the same experience? The plants are covered in brown algae again so there's no lack of food for them.