Bio pellets are peeling and clumpy

[kien]

I think the principle behind the pellets and zeolites(rocks) are similar in that they grow bacteria. Both have to be shaken frequently to rid the media of all that bacteria byproduct. It is up to the hobbyist to decide how to go about doing that. You can either manually shack them once a day, rig them up to some sort of pump but still agitating them periodically. Luckily for biopellets you can automate this process of shaking them by allowing them to tumble constantly. Some people have MacGyvered reactors to try and do this with ZeoLite rocks as well with varying degrees os success. Any of the above should work.