How does the rw15 compare against the wp40 in the wave modes (w1 / w2 / w3)? Better, worse, pretty much the same?
I run a single wp40 in my own 90g right now, set on w1 or w2 continuously... I am very happy with it, I am able to get that 'wave' ebbing flow throughout the tank with just the 1 pump. Been running 17 months w/o any problems.
Corals seem to love that pulsing 'wave' flow as well. So, not a lot of incentive to change anything.
But if the rw15 is at least as good as the wp40 in this aspect, it might persuade me to pull the trigger - since the 15 would take up less space in the tank (and probably look a little less conspicuous on the side glass where the 40 is now)