I currently have a 20 gallon long with 2 Nicrew 30 watt lights on it. I’m not too sure whether they’re doing a good job though. My Florida Ricordea looks like it’s losing color in the center and I’m not sure if they happens naturally.It is fully open though. I was thinking about going with T5 but I wanted to know what you guys would reccomend. If I do go with t5 are there any fixtures that hang on the back of the aquarium?