put them in the deco rocks and you won't even know they are there
When they cease from calcification and you have to remove that goofy a$$ rock you will
Dave, the plastic "C" style pump holder suck. Yes, Tunze fixed the issue with the C bracket cracking, but over the course of a few months the plastic stretches outward. On the nano versions of these pumps the actual pump will change direction because the C bracket doesn't hold it tight enough. The same design would make me nervous with over 5000gph coming from the powerhead. Hopefully they made the bracket of a MUCH more rigid plastic.