I have use them for around 2/3 weeks - used around 80% of the fleece and I decide to go back to the Clarisea SK5000.
for the time that I have use them I didn't had any problems, my sump has 3 x 4''filter socks so I use one filter socks and 2 x Vastocean and around 2000lph flow. Due to my water level in the sump is around one inch under the water in the filter socks chamber I need to replace (clean) them every 3 days and the 4'' Filter rolls are going very fast:
Using the SK5000 I can get around 3400lph and if I manage to get 4 weeks with a fleece roll I am happy. I am also looking at the possibility to add a second SK5000 that should improve the life of the fleece roll with around 20%-50% also the rolls can be wash and reuse (is a little work), I think that the Vastocean rolls can also be wash and reuse, the material looks very similar with the Clairsea
If someone is asking what tank: 300x66x61cm and 8ft sump with 48 Discus fish + other eating around 40gr of beefhart and 10gr of granule food daily.
