I think i have an very easy and relatively cheap way to cool a tank a larger tank would use a larger cooler and a larger hose but here is the DIY plan i dont quite know what the best material for fish safety and good heat conduction is but here goes nothing .
You tank a water pump of water size wanted depending on tank size and a cooler , as in a camp cooler or lunch cooler depending on the size of tank again. You drill holes in the cooler and run some sort of tubing through the cooler (the original plan of this idea was for a makeshift cheap air conditioner fan and it worked so they used copper (great conductor bad for fish) ) Anyway you run the tubing through the cooler fill the cooler with ice and water the ice and water in the cooler cools the water as it is pumped through the tubing by the pump just keep ice in the cooler and it should keep cooling the tank as long as the pump is pumping water through it. Also im sure that it could easily be retrofitted into a preexisting sump filter or dump filter rather easily . Ive never tried it but it sounds like it should work no prob . and with a heater in the tank set at the lowest temp you want should be easy to control temp to.
If anyone sees a reason why this wouldnt work let me know. and if anyone has a good material to replace the copper with that has good conductivity let me know that too.
You tank a water pump of water size wanted depending on tank size and a cooler , as in a camp cooler or lunch cooler depending on the size of tank again. You drill holes in the cooler and run some sort of tubing through the cooler (the original plan of this idea was for a makeshift cheap air conditioner fan and it worked so they used copper (great conductor bad for fish) ) Anyway you run the tubing through the cooler fill the cooler with ice and water the ice and water in the cooler cools the water as it is pumped through the tubing by the pump just keep ice in the cooler and it should keep cooling the tank as long as the pump is pumping water through it. Also im sure that it could easily be retrofitted into a preexisting sump filter or dump filter rather easily . Ive never tried it but it sounds like it should work no prob . and with a heater in the tank set at the lowest temp you want should be easy to control temp to.
If anyone sees a reason why this wouldnt work let me know. and if anyone has a good material to replace the copper with that has good conductivity let me know that too.