Very good.. I will run with it. Thanks for all the feed back and posting of pic's. Having a v3 sump like us requires little more pluming work. One last thing is what the reasoning for raising the Clarisea up around 3-4 inches. I have seen others do that as well. Again for all the help.
Good explanation on Clarisea web site concerning water height.
https://www.theaquariumsolution.com/clarisea-fleece-filter-operation-tips-troubleshooting-guide
B - FLOW RATE
In addition, the flow rate through the filter will also make a difference - the higher the flow rate through the ClariSea fleece filter, the more "sensitive" the filter is to the filter fleece becoming blocked by particles. Higher flow rates will cause greater amounts of fleece advance - i.e. the float switch is triggered more frequently with more flow as the water level in the Clarisea filter rises more quickly.
C - HEIGHT ABOVE WATER
Finally, the height that the unit sits above the water will also affect fleece life.
If the ClariSea unit is positioned so that only the bottom of the unit is in the water then there is a tall head of water pressure within the unit to force water through the filter and the fleece will last longer.
Conversely, if the unit is almost fully submerged then there will be a low head pressure to force water through the fleece and the water level will rise easier, triggering the float and moving on the fleece.
We would generally not suggest immersing the unit by more than 200mm and generally the higher the better.
CONCLUSION
So, from the above it is clear that there are numerous factors that affect the apparent "performance" of the ClariSea filter. All of these factors will have an effect on the rate of usage of the fleece! This makes it very difficult to state a flow rate for the ClariSea Filter.
If you find that you are experiencing a higher fleece consumption than you would like, then you may want to adjust the bypass of the ClariSea filter to decrease the flow rate that actually passest through the filter. Please make small adjustments each time and monitor to achieve the fleece consumption that you are happy with.