will this work? Siphoning from tank to tank

[2pts]

Thanks everyone.

I'm going to keep on the look out for a good deal on a used stronger pump which will feed the 6' tank. I'll keep the weaker pump supplying the 3' tank, from the same sump.

I am now thinking to add a return line to the 3' tank which I can hide through the rear wall/back of canopy. Then change the two 1 1/2" holes to 1 herbie return and 1 emergency drain.

On the 6' tank, a 1" herbie in each corner, tee'd together just under the tank going into 1 1/2" line, then with 1 gate valve to restrict the flow. 1 emergency 1" drain in each corner, both seperately running directly to the sump.

Mike... thank you for the kind offer, but I think I'll just hold off setting it up up untill I can find a used pump.

I bought an RO unit from phitopharmer without the cartridges a few months ago. I have been just running to the RO/DI pay water station near Polson Park for my top up water, and drinking water.

As I am not adding any liverock to my system ( I have about 240lbs I am just going to be splitting between the 2 tanks), that means I am increasing my water volume of my system 125 gallons.

At $7 per 20 gallons (the price at the pay station), it would take me $42 dollars to fill the new tank. Plus about $20 / month to do water changes / top ups. So I figure I'll return my ten water bottles at $10 deposits per bottle for $100. The money I will use to get my RO unit up and running, when I'm ready could I hit you up for your help Mike? From seeing your system, you obviously know your stuff with the RO units.

Thanks, Shawn.

[mike31154]

Sure thing Shawn. If you wish I'd be willing to run my RODI for you to fill up a few jugs. LMK how much you'd like and maybe bring the containers over & I'll fill them up for you.

[Delphinus]

I have seen folks run two tanks where the tops were at the same level and just connected by U-tubes. As far as flow theory goes I don't see a reason it wouldn't work.

But I wouldn't do it personally. Not just for the risk of disease as you've already pointed out but that for fish poop and surface oils you kind of want a direct line to your skimmer. Also U-tubes get air bubbles and the siphon can fail.