Help with heating!!!

Let’s make this long story short. I’m stuck to my 4 car garage for my fish tank, I don’t have a gas heater in there yet but am going to look into it (have to add a gas line around the outside of my house to the back side of my garage). I do have the heater just need to extend the line. I have a 150g cube, 30g sump and 125 sump turned into a refugium/frag tank. To heat all that water I’m using 1500w and it’s turning on every 30min, needless to say my electric bill is stupid. Does any one have advice on how to costly fix this issue. I can insulate the garage doors but will only do so much since the garage door is opened every time the wife leaves. My water heater is in the basement and not possibly to do a pex line (or whatever) some do. I do have a bathroom along the opposite wall of my tank… Not sure if I can do something with the hot water some how? If nothing else I’ll have to decommission the 125, I’d love to be in the house and bought the wife this house so I could but we can’t compromise. Any ideas however crazy would be appreciated.

Better start kissing some booty get that tank inside the house will solve all your problems

Maybe some type of inline pool/hot tub heater? New wife?

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Put up some walls around the tanks and enclose them into their own room. Insulate that, and run a heating duct to it?

Is it possible to enclose or partition off the space with the tanks within the garage? If you could shrink the space that you have to heat you could do it more economically.

Had I thought ahead this would of been best but the DT and 125 sump would be split. The sump would be enclosed and the DT would still be in the garage.

We bought a new house for it haha. I’ll be looking into getting a tank in the basement but it’ll be tight and won’t fix the problem I have now.

Heating is about 70-75% of my tanks costs... and I don't care at all if my MH put off any heat. I use 5 300w Ehiems on a Ranco.

Outside of wrapping the tank with moving blankets and covering the top to stop evaporation, it might just be what it is.

heating the garage would help but only so much.

I might of figured something out though. Our water heater room happens to reach up to our family tv room. I could have a tank in the family room and cut holes towards the bottom of the wall to drain to the water tank room and have that be my fish room. Not the largest but it would work. Have my main water supply in there and a sump pump incase of overdoes so not the worst. Main problem is wife’s consent and then finding a tank nice enough that I can afford to be in the house.

A short term fix could be wrapping all your glass in 2" rigid insulation... Cover the tub with CA or plexi to insulate the top maybe

Like the others I was thinking that rigid foam insulation around the sumps? Getting the sumps up and off of the concrete floor might help too, I don't know how you have them all set up. I wonder too if you spaced out some smaller heaters maybe the one big one wouldn't have to heat all the water on one side and then have it get cold by the time it gets to the display....plus it would be good in case your big heater ever died.