I'm not sure if I mentioned it either, I have been so busy lately I forgot where my house was the other day. LOL Dont feel bad!
I made the opening bigger and plan to add a wood panel that will be hinged, that way I can lift it up and access the front of the tank for maintance.
Now that the closed loop plumbing is done there is not as much room their as I had hoped. But at least I can still fit through it enough to reach into the tank.
The tank is 27" deep and it is all I can do to reach the bottom anyways. And I am 6'4". I can only amagine how hard it would have been to reach the front of the tank had I not done it that way.