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I had two XR15's and one XR30. It's physics, pointed light source will produce shade. The old school metal halides are also pointed source but usually have a big reflector covering the tank. Unfortunately this cannot be done with LED's.
The flashers wrasses are small and can be kept together in a larger tank. Most of the fairy wrasses are cool to each other also but I would just pick on. Yellow coris and melanarus are peaceful too I will pick on out of these two. Then you have the leopard wrasses which are mellow and...
Looked this up and it's interesting. I use an apex JR to monitor temp and PH but use smart outlets extensively for everything else. These outlets are so cheap now and I enjoy the ability to ask alexa to turn them on and off. One day someone will come up with standalone sensors and an app to...