I have had this Rotor-tiller for several years now without eaggrate. Bow front tank......
BUT......The issues with them are they DO tend to be jumpers ( no issues with mine) quiet home no kids anymore to startle him with noise. Also a nearly 50 gallon fuge feeding the little pod eater. I have seen where they are tide poll skippers. As long as they have food in this "little tide pool" I think they do not tend to try to leave the pool (jump out of your tank) But it your tank runs out of pods etc , carpet surfing 101 seems to be their next class in school.
The do eat just about anything in the substrate (pods included) leaving the substrate barren of seeable critters. Next, they will rearrange the landscaping of your substrate regularly!! If you have a "DSB" he will make mountains out of it in places. Other than these issues, they are just about unbeatable at keeping the substrate clean, but you pay the cost of living with these issues forever more. Plus they are a neat fish to watch work...... Hope you have better luck with the next one...
Here is a shot of mine doing what they do best making bits of sand fly! Good Luck.... Warren