I recently bought this small tank for my daughter to try her hand at reefing. Sometimes kids want to try things and the following week they forget about the first thing and want something else, so I went small and basic. My question is what are the limitations in terms of types of coral that this tank can sustain? It has two 36 watt 50/50 cf lamps. My last tank was more than 250 gallons with a 72" combo mh/cf/led light so I do not have much experience with this new tank. Thanks in advance for any info.