NEW Tank Build !!!

[Aqua-Digital]

Ok so what I have learned is this

drain 1 Durso style with balancing gate valve at sump?
drain 2 = open acts as overflow

You balance drain 1 until it stops sucking in air and drain 2 takes the excess water?

[lastlight]

you don't need dursos really. the full siphon can just be thru bulkhead. i tune the flow so it just barely trickles into the secondary standpipe. You make the standpipe / emergency drain taller to raise the water level in the overflow box and make it as quiet as possible.

[Aqua-Digital]

so the emergency also allows you to balance the height of the water in the tank?

[lastlight]

the height of water in the overflow box. the standpipe/emergency should still be a bit lower than the overflow weir / cutout so you don't raise the display's levels.

[Aqua-Digital]

my cut outs give too much gap between euro brace and water height thats why I asked, instead of closing off the depth of the teeth I thought it would be easier just to raise the standpipe?

I need to raise the tank level basically

[lastlight]

i guess you could but would that scenario skim the surface as well? i'd personally silicone a strip of glass inside the overflow to raise it up a little. it could be glued behind the existing teeth.

[Aqua-Digital]

argh yes you are right, time to get the silicon gun out

Brilliant help thanks.