My golden loach keeps hiding under the ugf and i was wondering if he can get stuck under there. There is about 1cm gap between the filter and the bottom of the tank. It would be nice to see it once and a while
Definately upside down, edges of the plate should meet with the aquarium glass and when you lay gravel down it seals it so it must be upside down mate!!! ok mate?
When you empty your tank to reverse the ugf, keep the water. You will find that your fish will suffer less stress when you return them into the same water.