Thank you; coping saw, trb & flexrac!
trb, I hope I am wrong with my thinking, cause I'd like to hide the drain as you suggest: My understanding of the air relief hole(s) of the derso is that they should be above the rim of the tank??? With the suggestion of lowering them below the overflow level there MAY be a remote, off chance, slim possibility of the drain (and in this case both drains) not keeping up, or if one drain becomes plugged or restricted, the water would rise, cover the air vent holes and create a full siphon of the drain pipe and overflow the sump? Is my understanding wrong? Has anyone ever had, or even heard of something like that happening? As stated earlier, I hope I'm wrong here.
Mike: Yes, I'm liking the pictured rocks, and just keep fighting the urge to keep moving them around.
I am a little disappointed--NOT WITH THE PICTURED ROCKS, but with a couple other rocks I got through "aqua-mag". They claim their magnets will hold their rock up to 5/8" glass thickness. Mine is only 1/2" and with these attached, these suckers slide right down to the bottom. I even thought maybe my latex painted back glass made the magnets pull weaker, so of course, I cut out two small spots for the magnets to have a clear area........stupid idea!!:x I get to re-paint a portion of the back glass.
(Imagine a rock split in half, with a perfectly flat back, and magnets encapsulated in epoxy and mounted inside the flat back of the rock. Your supposed to be able to make a ledge of rock coming off of a glass tank wall). My plan is to try and find some stronger outer 1/2 magnets and get these to work. We will see :?