I've got rid of the raccoons - for the past few months, at least. After browsing the internet, I found a technique apparently used by pot growers trying to get raccoons to stop eating their crop. I adapted that for under water. First, I bought some wire fencing (1x3", I think). Then I cut it to the same size/shape pieces as the shallowest step in my pond. Then I cut each horizontal (longer rectangle side) wire in every other rectangle and bent the wire up. Each up-pointing wire has a slight bend in it so that it provides an irritating poke and then a more hard poke to any raccoon foot that steps on it. Then I painted all of these pieces black (I had bought the thicker, uncoated fencing) and anchored them into the pond with rocks here and there.
Since then, the raccoons have stopped playing in the pond and destroying the pump pre-filter. I doubt they're gone for good, and this solution makes it harder to clean the leaves off the shelf, but I'm happy for now.
For good measure, I also added a wood "no skinny dipping" sign. I'm pretty sure that'll help keep out any English-reading, rule-abiding critters.
Since then, the raccoons have stopped playing in the pond and destroying the pump pre-filter. I doubt they're gone for good, and this solution makes it harder to clean the leaves off the shelf, but I'm happy for now.
For good measure, I also added a wood "no skinny dipping" sign. I'm pretty sure that'll help keep out any English-reading, rule-abiding critters.