Review on Fluval Suction Filters 30 Millimeter 4 Pack by Carmen Jones

I have been keeping fish for over 10 years. I'm constantly changing my setup, adding new scapes, new gear for both salt and fresh, and over the years I've used many different suction cups for different needs. Some suction cups work better than others, and some don't last weeks before they harden, change color, and fail. I've spent a lot of money on what I consider to be very expensive suction cups, but right away I can say that they are very good. As soon as I touched them for the first time, they became different. They stick immediately and do not move. I use them to hang 2 driftwoods in my 50g tank which are quite heavy. I could never get it to work for a while until I got them. Fluval makes high quality packaged products and they are no different. Worth every penny. I wish there were more sizes and attachments as I would redo everything. If you are looking for large black suction cups for heavy objects, look no further. It's been about a month, I'll update if and when they don't work.