I pulled all of the old powerheads and got two more Tunze 6100's. Put all of the Tunzes behind the rock. I've got two small "dead" spots in the top of the tank along the back. Not really dead, just very limited current. When I get the wavebox for the 150, I plan on pulling a couple of the Koralia 2's out and I'll use them in the main tank in the weak spots.
lawn gnomes = c o r a l on April Fools Day