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closed loop-yes or no

i was thinking about running a closed loop, i dont want to drill holes so i was wondering how i should do it, i have an extra mak4 pump, and i was going to try a spray bar system or a couple sqids, any suggestions would be great
 
I used melev's design and it worked really well. I might tee the outputs of a single sqwd over having multiple of them.
 
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