so i have another post under the fish page but the number of people that actually visit there seam to be pretty low.
I have a greenhouse with 2 fish tank - ponds in there. 1 is 800 gallon with trout, and the other is about 1000 for tilapia.
the Trout are fin with this cooler weather their tank is staying in the 60s without ant additional heating.
the Tilapia water temps had been getting low so i bought a cheap OnDemand portable water heater.
This was bought from Ebay for about $130. quite a nice little system for the cost.
the water heater is plumbed into a small propane tank and powered by 2 batteries.
I have a pond pump with a connecting hose feeding into the heater and an output hose that feeds into another hose weighted down with an old plant pot so it sits on the bottom of the tank / pond.
the outside temps here in Ohio have been getting into the high teens low 20's for the last few weeks.
I also have a home built solar heater that i use when the sun comes out. (not too often at the moment)
well i,ve been managing to keep the Tilapia water between 70 -80 degrees, and the greenhouse temp has not dropped below 50 degrees.
I do also have another heater that is not installed yet just incase i need the additional help. this is a small heater that is designed to be used for campers, boats and semi trucks.
Its a diesel fueled Webasto type heater, I have one already installed in the wife's greenhouse and it works really well.
but I would like to know what other people are doing and what temps your maintaining