i've seen a couple of used waveboxes on MR in the 250 range and somehow that seemed palatable....i mean...at least it feels like ur getting some equipment for the money...and its tunze.
now i'm thinking that with a 30long tank space it too much of a premium for another box....already have a tunze nano skimmer.
when i first looked at the mp10 it seemed like a lot of money for just a regular pump and one of these meat timer controllers.
whats better/worse about a "propellor" pump (like korallia) vs the old maxijet?
one shoots single stream while the propeller is multidirectional?
Okey dokey. A wavebox can give a neat look, but definitely needs to be supplemented with additional waterflow. As I said, I wouldn't use one in a tank of this size anyway.
A
Vortech is highly controllable, which is mostly what you're paying for. I like them a lot. I wish they were cheaper, but I like them a lot. They create really useful flow and their flow rate is super adjustable, which makes it easy to adapt them to many different situations. For instance, as corals grow they increase drag dramatically, requiring stronger pumps to maintain the same level of water motion. With a Vortech you can just turn the flow up over time (years). Ditto with Tunze streams.
Propellor pumps in general move a lot more water for their electrical consumption (say 4-10x as much), so are much more energy efficient, and they tend to produce a much broader flow stream of lower water velocity as compared to similarly rated impellor pumps. What we want in a reef tank is a lot of water moving at a moderate rate, not a small amount of water moving ridiculously fast, or hardly moving at all. Propellor pumps tend to make it easier to provide useful water flow as compared to impellor pumps rated for similar flow rate.
In a nut shell, propellor pumps just make it easier to achieve good flow rates throughout an aquarium with fewer spots that have either too much or too little flow. It's certainly feasible to achieve success with impellor pumps (we did it for years), you just tend to end up with larger areas of flow that is too strong or flow that is too weak, so you have to be more careful with pump/coral placement and watching for dead spots.
cj