Hey again all, sorry bout the link, it included the period that was supposed to end the sentence, not become a part of the link
www.aquaticeco.com let's see if that works. Chainsaw, I'm still checking out the costs of "electronic" valves as opposed to the pressure valves I mentioned earlier. So far I'm fairly certain that it's not going to save much (if any) over a wavemaker and powerheads but it does allow for the personal satisfaction of DIY LOL. I don't think you even need the sprinkler heads on the system, I'm thinking along the lines of reducing the PVC from 1" down to a 3/8" jet arrangement, cycling the lines via the electronic valves. One drawback is that you've got to have one thru-hull (bulkhead) for each *zone* that you're jetting to, fortunately I'm still in the construction stage and I don't think that's a problem. I'll let you know as new things are discovered, probably should start a new thread though LOL ... my appologies for taking this thread off subject a bit.
Later, Paul