Personal experience? Use a 2217 if you plan to use lily pipes. Use a throttled down 2217 if you plan to use anything that concentrates flow. Definitely use a 2217 if you're running anything in-line (heater, reactor, etc.).
thanks for your feedback. Nub questions, can you throttle down the eheims? I would like an inline heater to keep the tank clear of hardware if it all possible based on my limited space.
Lily pipes? More reading... haha