Need opinions on ViaAqua Acro-Cal Calcium Reactor

[Tangman]

I am using the ViaAqua Acro-Cal reactor and have no problem with the impeller shaft, but I do agree it is hard to tell if the impeller is turning unless the Co2 is on. But if your calcium needs are not high, then for $50 bucks it's worth it. I mean you couldn't DIY one for less

[imisky]

ive been using this reactor for 10months now, and i have the same issue as RuGlu6 regarding the impeller shaft, mine i did not even take it out it just disappeared. and the same rattling theme occours as well once in a while but a shake here and there does the job. imo this reactor is " you pay what you get" not bad for a $50.00 reactor (comparing price to what you get) but it certainly can get improvements. very easy to tune i think