Just got a pair of Jaguars 3 days ago.Male is 7 inches,female 6 inches.The first day I got them they were swimming all over the place.Now they hide all the time.They are in a 90 gallon by themselves.I use very subdued lighting(2 strip lights made for 5 gallon tanks).Should I use some floating plants too,or just give them more time to get used to tank.