- Joined
- Nov 13, 2020
- Messages
- 1
- Reaction score
- 20
- Location
- Oxford
- What state or country do you live in
- United Kingdom
Hi, I’m setting up a marine tank for the first time after years of keeping freshwater, ive bought a tank and all the equipment, only thing im questioning is the sump. Im confident in how they work but mine has a divider with no way for the water to pass through, I’ll attach images. If anyone could let me know what this is for it would be a great help, thanks


