Do you have the aqua prime deal link?I second this suggestion. Hipargero has done me very well when I was on a tight college kid budget. They will grow dang near anything in a 15-gallon tank. I had mine over a 29 biocube and it was growing acros at the top of the water column. I have seen shops down by me also using these instead of Radion, Kessil, etc and they're doing fantastic. Your other option is to wait and pounce on a good deal for an AI Prime on here. I saw one yesterday for $120 with a bracket.