My Aquascape Tsurumi 5-PL pump got clogged with acorns and has since become noisy. I've had more clogs since, twigs, a frog. Noise keeps getting worse with every clog. pond shop tells me it's gone, so I bought a new pump. But how do I prevent this from happening again? how do you fool proof your pump from getting clogs if a clog is enough to damage it? I have a standard aquascape skimmer box with the net and the filter pad. but I can't stop tiny particles from getting down to the pump area. acorns will end up there no matter what I do. Any tips?