why isn't this kind of tank done very often, huge tank costs, bacicily you need a double walled acrylic tank to stop the condensation. Huge chiller costs, takes way more to cool a tank than heat it. Lighting, believe it or not critters still get a fair bit of light up here, but instead of the 250 HQis you could probably get away with a Good VHO, PC, T5, or small MH set up.
as for the tide issue, good idea but hard to do. you need a pump that pumps slow enuf to take 5 hours to fill up the other tank, then your drain has to drain slow enuf to take 5 hours to drain down. that will give you your hour "slack tide" that you see in nature. Also man will that tank stink at low tide so I don't know if I would wantit in a living area
Steve
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