04-13-2011, 02:19 PM
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whats the expected flow rate?
Also why 2 heaters? I have heard of heaters being placed in 2 places in a tank, for even heat distribution, but never side by side. You might get more use out of it if you ran the second heater closer to the pump since running them side by side means heat loss through the next levels of media wont be reheated until after its gone through the tank and back down. Also if your flow rate is high, the water wont heat up as much if theres only heat being distributed in one area since water can only pick up x amount of heat in a certain amount of time.
The separate lids are a good idea.
Are you making this from scratch out of acrylic?