[Carol]

I'm wondering how deep a sandbed people have if they have this kind of overflow. The All-Glass overflow system has inlet openings at the bottom of the overflow wall & if your sandbed is very deep you can cover these openings. What's everyone's feeling on this?

[bkhunt]

You can slope your sandbed so that one end is deeper and the other is just below the inlets. The front sand against the glass looks level but it has a slight slope to the back cornor. Once you place some rock there you will not be able to tell it is sloped. HTH

Brian

[Iron Crab]

I have an AG w/twin overflow and my sand bed is over 4" deep. I filled the sand up to the bottom intake on the overflows in the back but my sand bed is not level and it is deeper in some areas. I think I read somewhere that someone (on the board??) covered the bottom intakes with a strip of plastic. So far I haven't seen a reason to do this at this time. One problem though is my clownfish likes to dig a hole in one corner and the sand and silt is sucked into the overflow.
I never tried to just cover it with sand- don't know what if anything would happen.

[thezookeeper]

If you fill your tank up to the bottom notches of the bottom overflow inlets, it will only allow 3 inches of sand in that area. I measured it, as I had this problem when I started. Even when I sloped that sand, inevitably, the sand is slowly sucked out of the tank through that overflow. I have not solved this problem to date. I like the idea of the extra flow in the bottom of the tank, so I just let that side go at 3 inches. Fancy rockwork will/can hide that. I didn't want to cover the opening and defeat the purpose. If only they'd raise the notches a little higher!


Joanne