Heater size

[MR BACKHAND]

I have a 125g tank with about 30 g sump.
I want to run 2 heaters. What wattage would you recommend.
I’ll be using Eheim tru temp heaters.
Also I see the inkbird controller seems popular., Which model do you use and recommend.

Thanks

 

[SteveEreef]

It depends. I use a rough guide of 3-5 watts per gallon. I keep my house at 66 and my tanks at 78 so I use 5 watts per gallon. Two heaters on a cheap inkbird off of amazon. Ranco is the best controller Im told.