I would love to know more about it toI would love to know more about your arduino setup, I have been considering adding digipots to my rheosatically controlled dimmable LEDS but am unsure of the process.
I like the sump layout. I don't think you need that lip before the filter sock. I almost have that same design on my sump that i built. Once again, great attention to detail.
Coming along very nicely? Are you planning on putting sand in the tank up to the level of the tile? Also how much flow are you going to have in the tank?
Is there a space between the glass and tile without sand?
Are you removing the two pipes that go through the tiles? What were they going to do if there was not any sand in the space between the glass and the upright tile?---Rick