New sump startup Questions.
 

Ok my 75 gallon tank had been up and running for 3 months and I just finished my sump build out of a 40gal breeder I have everything in place skimmer return pump overflow box now what's the best procedure to start this thing up and get things flowing? First time using a sump.... Any help would be appreciated thanks mike

I just upgraded my 90 with a 40 gallon sump for the 1st time last nite. I just started it up and started running it

How did you start it did u fill he sump first? Prime the overflow box and plug in the return pump? How is your flow? Are you using a ball valve on return pump... Thanks mike

I filled the sump and have a drilled tank no over flow box. Once sump was full I filled up the tank and once 80% full started the sump, them added water as needed

I do have a ball value on the return, here's a pic of my sump. Not the best pic but can see it

Attachment 201609

Similar to mine...

Had it running since Sunday and all is good

I'm using a lifereef overflow an sca-302 180 gallon skimmer and a mag 9.5 return pump....

Have the same pump and using corallife 125 skimmer

Remove the over flow, fill the main tank to the rim (1/2 inch below overflowing) This will simulate a blocked overflow or overflow failure
Then fill the first and second sections of the sump You want as little water as possible in the return area.

Now reconnect the overflow and let it drain into the sump.
(This simulates a return pump failure) When the water stops draining and settles mark the level in the return area This is the MAXIMUM fill level of your sump As long as you DO NOT fill over this mark your system will not flood. If it look as if your sump will flood you'll need to raise the overflow weir so you dont drain as much from the main tank