cf, the Fluval 405 I currently have on my 90 gallon tall Lake Tanganyika used to be on my 125 gallon. As you know, this 125 long tank is moderately planted .... it did a very admirable job given that frankly, it was not enough filtration for a planted tank of this size. It wasn't long before I bought the FX5. The tubing on the Fluval 405 was constantly getting coated with debris. Every time I primed, I got a cascade of plant bits back into the tank (which I minimized by placing a net over the output before switching back on). I solved the problem in the interim by performing more regular cleaning of the mechanical foam in the filter (2-3 times a month) and by rinsing the hosing out once every 2-3 months.
I have never had any problem of this nature with the FX5... the flow is too strong to allow junk to accumulate on the ribbed tubing sideawalls :thumbsup:
.... beast filtration.... LOL