I understand this is water.. but there is no Forum for this.
Ive got one word, AIR!
air cooling is the way to go, but there are more restrections.
if you use a vortex cooling system and a compresser out back (the down side is the compresser) you can cool a system like crazy.
Thermostat control / 15 SCFM
1/4"NPT/ air filter
900 BTUH (225 kCAL/hr)
lets get the cooling on