You should get a pre-drilled tank with built in overflows. Otherwise your choices are to HOB
overflows or drill the tank. Every flow has a rating for how much water can move through it (gph
) based on the size of the hole. Assumng 2 overflows rated at 600 gph
each you need a pump with a rating of 1200 gph
or less AT a head height of whatever the distance is between the location of the pump in the basement and the return to the tank (probably 10'-12'). Does that make sense?
Are you sure you want a wet/dry setup as opposed to a straight sump?
Take a look around Melevs Reef
site and look at this sump
For that size tank you want a skimmer like this one.