Well I started with 6, two years ago and I currently have 3. I just had one die about a week ago. It had rubbed on a baffle too much and I didn't catch it in time.
I just use a 2- bulb (aquarium/plant) 24" florescent light from Wallyworld. I tried the float method when I lived in FL but it didn't work as well as just having them grow in the sand. One thing I should probably do more with them is rinse them off. I rinse them when I think of it maybe once a week or two. They are very low maintenance just a shower every now and then. If you do try them good luck and don't forget, slow growers.
I just use a 2- bulb (aquarium/plant) 24" florescent light from Wallyworld. I tried the float method when I lived in FL but it didn't work as well as just having them grow in the sand. One thing I should probably do more with them is rinse them off. I rinse them when I think of it maybe once a week or two. They are very low maintenance just a shower every now and then. If you do try them good luck and don't forget, slow growers.