No they are pretty straight runs, everything would working fine but if I opened the valve to the skimmer past a certain point it started blowing bubbles to the main tank. From a hose barb on the teed line to the skimmer is about 24" of clear hose so no trapped air there.
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Brian
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220g inwall 48"x36"x30"
110g mangrove refug/sump
Poison Dart Frog Vivarium
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