thanks for the pics. I have a 270g so i will be doing 1gph as a start and then 1gph afterwards.My 1/4” fresh water supply line runs around the ceiling of my fish room then i use t’s to drop it down to the tanks. I use the cheap poly ice maker tube for the main run and this softer black tubing from a sprinkler supplier for the drop downs and emitters. This example is a 450g with 4gph… 2gph per emitter. I recommend 1gph per 100gal as a starting point. 2gph per 100 gal is fairly accurate also for higher stocked tanks. You can also see the small black clamps on the emitters also. They lock on with pliers but can be removed.
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i will order the softer tubing for the emitter side after push fitting