The new prop tank is running.
 

Guess I'd better catch it. :D

Here's the pics of it patched into the 30 gallon reef to cycle the water and jumpstart the system faster...I'll run it this way for a while... and transfer it when I get home...

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it looks even better in person!
hey all, Jason will be gone soon so we can go help ourselves! :D

Over-the-back spray bar on the 30?

What are the white things on the upper inlets on the larger tank?

Yeah Scott, that spraybar thing was a temporary throw together a couple years ago, and it never got upgraded. Worked like a charm. I didn't want to upset the ballance of this system by tearing it down to drill it. It's also the last undrilled tank I have (save for the 300 which being buffed out when I get to it and will have a 3 3/4" bulkhead.)

The upper returns on the 75 are homemade water diffuser units designed by Daddavis. I call them "Dan Cans" but the name they use in the Catalogs is different - they call them inductors or eductors.... They spray a nice fat stream of water, pulling some water from behind. I love them when used in conjunction with a SQWD to alternate water flow. The wave action is great for ony the 40$ it costs. They seem to need service about every other year though.

I see there's some mods over on the diy area if you dig enough... to allow you to take them apart to service it... I would have paid 1.5 times the price if they would have made it serviceable.

Jason

:bigeyes: **GASP** You own a tank that's not drilled?!?!?! I'm so disappointed in you... :lol2: :rollface:

Yeah Nellie, something just doesn't seem right about that!!

Hai jamkarcz, about your eductor, any web or detail ? Thank's

I may be able tyo help here. Its a 2" PVC Cap which you slot before assembly on a table saw. Jason has a real nice jig for that. The end is a reducer from 2" to 1.5". A very short piece of 2" PVC join the cap and reducer together. You really don't have to use any glue to hold it together either. At least with the ones I made. When I built mine I put an X inside the 2" PVC portion to help force flow to the outside a little more. It was 8th inch scrap Plexiglass cut in 3/4" strips and then slotted to fit together.

The cap is drilled to accept the 3/4" fitting which if not threaded will have to be glued to the endcap.

The whole purpose behind them was to take the 3/4" outlet from the main return pump and create a wide gentle spreading cone of water. If you remember the 92 GAL corner tanks at Good Shepherd in Seymour. The water movement filled the whole tank from just one.

Real eductors use high pressure from a small outlet and shoot it through basically a funnel to quadupal the turnover rate inside the tank. They can pull as much as 75% of the tanks water into the output. The model you see in this thread adds about 40% to the output which is still significant.

When hooked up to a squid they produce interesting affects especially if both outputs are in the same tank. But like what was mentioned already you should really modify the SWDS first so you can service them and improve the output.

Hope this helps.

Dan

dadavis, since that isn't restricting flow nearly as much as a typical penductor, do you think it would work well on a non-presure rated pump with a 4-way Oceans motion?

Should work fine Scooter, stop on by, we can pop over to H.D. and build you a pair for 5$.


And yep, that tank in front is the one Jon likes SO MUCH,