I have a 34-gallon Red Sea aquarium set up as a freshwater tank with the skimmer off. A couple of times adult Danios have gotten through the grate filter that cycles water through the back of the tank. I was able to rescue them in both cases. But now we have a pregnant platty and I'm worried that the babies will be sucked into the grate and killed, especially with the strong currents. Does anyone know of a way to prevent fish from going through the grate? There's a somewhat expensive part I can order but any more immediate, low tech suggestions would be helpful.







