The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
You have inadequate space for an archerfish. Archerfish usually live in groups in the wild. GSP won't live very long if not kept in the high-end spectrum of brackish water. The molly is ok with a mudskipper. Why didn't you just get the smaller figure 8 puffer? its smaller and lives in the same water condition as mudskipper and molly.