Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.
I am far from a seahorse expert but maybe it would be better to add multiple weak powerheads as opposed to 1 stronger one? Depending on the type of powerhead I normally try to make the intake face the glass, so it doesn't suck anything swimming by.