Hi everybody. I want to ask why my VATF so skittish, I have 1 Goliath 12cm, 2 bichirs, 1 goonch, 1 giraffe cat, 1payara and 1 vittatus 20cm, my vittatus is very shy and often crashes into my tank. Is there any advice to help my calm down, thank so much. My tank size 150x50x60