Very nice job with your build, documenting with pix and your willingness to listen to some voices of experience. I notice you've got your picture with the filter sock running in two different ways. The first pic with the sock hanging from the ball valve is a recipe for a major flood. With so much of the sock above the rim of the sump you stand a VERY good chance of overflowing onto the floor. No part of the filter sock should be above the rim of the tank. As the pores of the sock clog (normal and expected) the water level in the sock will rise (again, normal and expected). If the water level in the sock rises above the rim of the sump, there will most probably be a flood.
I had the sock on there just to get rid of the sand dust and I was cleaning it every few hours. I had it on the ball valve to keep it from falling in but noticed that i was stiff enough to just let sit in there. I took it off so that the whole thing would sit in the water with the rim just above to use the whole filter. The water never raised in the sock seeing that I was cleaning it all the time. If I left it to long it would let some of what it filtered out back in to the display. the sock is no longer in the sump and was only to clear up the tank after installing the sand and setting up the aqua scape.
Have you done a precautionary power outage test? When the electric shuts off, water from your display will continue to run into your sump until the displays water level reaches the lowest point of any overflow/return plumbing. You want to make sure your sump has enough capacity to hold all the water from the tank that will overflow. This is just a test of the power outage emergency.
I did a power out test when I did the fresh water test. when you turn the power off it fills the whole sump but not enough to overflow. I did allot of figuring before building the sump. If the setup is running and I fill it up to the top of the center peace of plexy in the bubble trap that is the most I ca put in the sump to keep it from overflowing. I guess my figures were right. The water gets to about .5" from the top of the sump with power off.
One more thing, the shrimp in the bag.....are there holes in the bag? Tough to tell from the pix.
Yes there are holes in the bag. I didn't have anything else at the time to use so I just punched so holes in the bag with a tooth pick and hung it on the glass with some earth magnets. If you can find some of these magnets they are great for hanging things in the tank anywhere you want them. You just have o be careful not to just let them slap together because they might brake the glass. they are that Strong. You just put the one on the inside against the glass and put the other one on the outside of the glass but not in line with the inside one, and then just slide them together. that way they wont slap together and brake the glass. They are so Strong that if put together you can not pull them apart. You have to slide them apart. They will not rust. They are the same magnets that they use in the Mag Floats.
Great job so far. Looking forward to seeing it progress.
Russ