Thanks! I'm really looking forward to hooking it up and knowing I'm actually getting water changes done
I always have 30 gal of SW mixed and 30 gal of FW for top up in Brute cans. Because the pump has 2 heads and 1 motor, it takes out exactly the same as it puts back in. So my plan is to set the intake of the one head in the first chamber of my sump, where my drains are and the discharge in the drain. The other head will take water from my 30 gal SW can and will pump it into my final return chamber of the sump.
My initial plan is to change 1% a day for a total of 30% a month. There's a thread on RC that shows that accounting for pumping out new water with the old, you still end up changing about 28% volume. This particular pump is rated for 100 gpd change so I'll just do the math and control it via my Apex on one of the plugs on the EB8.
For starters, I'll just do it in a tub of normal water to make sure I have the water volumes right.
I will have to watch my SW reservoir vary carefully to make sure it doesn't empty, but the pump is actually rated to run dry so it won't hurt anything if it does, I just won't be doing any more water changes. My goal is to find a couple 60 gal containers so I have a bit more forgiveness.