i have a five gallon hex tank that is about 1.5 foot around and 2.5 foot tall with a built in filter that filters up to 10 gallon and a power compact florecent bulb that is 20w and was wondering if this wuld be sutable for corals and some small shrimp i have a small adjustable pump that is used for a small waater fall setup for like a desktop fo current and a heater for the tank as well is there any corals that are sutble for this size tank thank you in advance