Most boats are gel-coated.
Gel Coat is resin with pigment, but they are painted with anti fouling paint below the water line. Prolonged water submersion can lead to osmosis.
Just use Fiberglass mat and epoxy resin to lay up the tank. Will cost a bit more but will last longer.
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150 Gal system 3'x3' 400W M/H, Bekett skimmer, Dart return,1/4 HP Chiller
180 Gal Drop tank, LED lights, Bubble master 250 skimmer,Hammerhead on a closed loop, Speed wave return.
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