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Edwin, that was a question i could not find answer to. I assume one nozzle so I would need to constantly switch nozzles with different colors?
here is the AMZ link - FlashForge 3D Printer
I did the same with 2 inverted bottles for smaller fish and used magnets. It does work well; just need patience.
Eventually, I bought the BRS trap off a member here for $20.
For those who missed the event our table as also next to Rhinosreef. He makes aquarium accessories; I bough a seaweed holder and others bought frag racks.