265 gallon setup

[Coderad]

Looking good.
But that 14/3 should be on a 2pole 15 amp breaker, not a 30amp.
The breaker is there to protect the wire and the 14 gauge wire is only rated for the 15 amps.
If an overload ever did happen it would start to melt the wire before the 30 amp breaker would trip the breaker.