Wet!
Wet!
Finished the plumbing between display and sump this weekend and did a freshwater leak and noise test. 4 leaks in total, all minor, even where I forgot to glue one of the 2" drain line elbows.
And to my great relief, the soundproofing is working. At 80gpm the tank is inaudible in the living area, and at 150gpm only audible if you get close and make a point of listening for it. Flow is also perfectly acceptable through the 1.5" side outlet 90s on the Sea Swirls, with a good amount of surface chop across the entire tank.
Still have a few problems to troubleshoot, the most worrisome being that the return flow won't reliably restart. This is a big deal because, though we have a whole house gas generator, it doesn't kick in until after the power has been out for a few minutes. When restarting, the pump tends to start cavitating severely and I don't understand why. It is primed, with the leaf trap full of water and the intake below the water level of the sump. There are no visible vortexes forming near the intake, and the leaf trap appears to remain full of water, but what happens is that about 5 seconds after starting up at 1800rpm it ramps up to max 3450rpm and stops flowing water. The first several times the issue happened I could clear the problem by removing the downward facing elbow inside the sump, then putting it back in place once the flow was stabilized. But this may have just been coincidence since on another occasion it exhibited the same cavitation problem even after removing the elbow.
On to the pictures. . .
Powerheads
4 Tunze 6255s and one 6305 on a custom bracket by
Timfish. Received but did not install the Hydro Wizard ECM63 as I'm still waiting on its mounting adapter ring to arrive.
Size Comparison
Top to bottom: Tunze 6255, Tunze 6305, Hydro Wizard ECM63.
Tunze Streams in the tank
I think they look reasonably discrete in the scale of the tank. Not as discrete as the single ECM63 will look, though. Will start with the Tunzes along the front glass, ECM63 along the back, running 20 minute rotations on each to allow for a gyre to form in each direction, followed by 20 minutes of both running for chaotic flow. If the ECM63 keeps up with the wall of Tunzes then I will probably swap out the column for a second Hydro Wizard the first time that the Tunzes need service.
Next up: setting up the quarantine tanks, skimmer, dosing, auto water change and top off, and reactors. The display tank is now drained and will remain so until the QT systems have been running for about a month.