[titus]

Hello,

Depending on your design, too much bubbles may be a very bad thing.

You can always throttle a pump down but if the pump is also doing the role of return for your display tank, it'll be difficult (very difficult) to configure it such that it's also doing the re-circulation for the reactor.

My suggestion is to get a separate high quality external pump for the re-circulation, and a feeding pump for pushing water into the reactor.