#rollermat

So there are a few ideas for DIY rollermats out there. The basic idea, is a roll of filter fleece (which are easy to buy down to about 20uM size). This is mounted, run down across a field where the overflow water pours, and up to another (’out’) roll where a motor can pull new material onto it.

The overflow water flows into this chamber, must flow through the fleece before it makes it to the rest of the sump. As the fleece gets clogged, the water column gets taller (and the higher column forces the water through the clogged fleece, to a point). At some point, it hits a float switch (or optical sensor), which turns the fleece so the water can flow through more easily.