I have a HOB filters for both my 2.5 and 5.5 tanks I have for RCS. I have fluval U1 foam pad over the filter intake. Do you think this would be sufficient for keeping shrimplets from being sucked up? If not what would be a suggestion? I have a Elite Sponge Filter on my 10g tank which I think should be good for it, but I'm not sure if the foam pads will be good enough for the smaller tanks?