Heater for Rays

[Bigfishnut]

Whats a bad place or spot to have your heater i want to avoid making mistakes

Anywhere it can get exposed to air. Best place to put heaters is near the return pump at the bottom of the sump. Somewhere it gets plenty of waterflow but can't ever get exposed to air

 

[Bigfishnut]

Whats a bad place or spot to have your heater i want to avoid making mistakes

Don't put it anywhere it can get exposed to air. Bottom of sump near return pump is best I think