The water level is to high and that's why your skimmer level will fluctuate. If you lower the water level overall (green line) to the top of the baffle(blue line is level and red line is where it should be because it will spill over into the 2nd area), then, where your return pump is, that chamber(3rd and right most) will fluctuate instead. You can later add a top off of you want. I would put the heater somewhere in the yellow area, that way, it will never run dry. Be sure to check your skimmer depth and make sure it's submerged to that depth in the the first (on the left) chamber. In the little heater area, you can put a bubble sponge but just keep an eye on it and when you do water changes, be sure to wring it out in the saltwater you pull from your tank.
I don't know if this helps at all, but hopefully you will see what I'm saying. Mine is a little different because it doesn't go over and under, but modification is the name of the game.. Oh and let me send one more of where I put my tiny fuge area..Hmmnn, about your heater, I cannot make it where it is. If it a submersible, then yes, but if your not sure, then I would error on the side of not. But as far as the cloudiness, it depends on what had been done. Because, if you added the rock unrinsed, and added sand, and then let it do it's thing, it very well could be just film on the glass. But, if after two days of everything running (pumps, skimmer, etc) and it's still that cloudy, I can't say I've run into that. Simply because it should have settled out. Should have.. Let me look again. I didn't take a screen shot with my phone this time.. LolDamon, i am completely blown away by the amount of help you have shown me. From drawing lines on my pic to the knowledge of the topic! Says a lot about your character.
As far as my heater, can it be fully submerged?
That is simmering I have tried to do, but failed miserably multiple times (always actually, lol).. I'm not quite rem3mbering the theory on that, but I think it was to save bulbs(t5) and cut down on nuisance algea growth. But the thing is, some things, a lot of things are dependent on light. So if turn mine on, for only the evening hours when I'm home during cycle at least for testing and tinkering around. It just, and maybe just me, gives me a chance to get into a groove with a new system..I rinsed the rock before adding to the tank which had sand and water already in. Just kicked on my lights for the first time and wiped the glass and sure enough theres a film on the inside. While cycling/curing should i leave lights off?
Lol, actually, this is something I just learned today.. If you have the room, put it in the overflow box. You, of course have to watch it/remember when you cut the power of your return pump, but my concern was with it touching the bottom of the glass box.. My heater is 13 5/8" and it worked out great.My heater is fully submersible but the damn thing is so long i can only angle it from top to bottom to get the whole thing under water