We do not, my best suggestion would be fiberglass window screen but typically what is the best is to shut off the pumps and let the anemone settle in a location and attach and then restart the pumps. Running them longterm with any sort of guard will be very difficult as they will always be clogged and will run hotter and suffer damage as a result. The Streams are not likely to kill an anemone, they may damage some tenticles but the flow is diffused over a fairly large surface and I had a rose anemone that got sucked into a 6000 Stream two times and always recovered, it died when my pump for my chiller failed and it bleached but the pump never caused any major damage.