Wow that is a really healthy looking tank you've got there! Having basic gravel I'd imagine not gravel vaccing is proving to be beneficialThis is my 55g I described above. Every one of these plants were plastic tube or bag plants that were in bad shape when I bought them (on sale). No specific ferts or CO2 added. Chunky black gravel with some colors mixed in. I don't gravel vac. Tank gets a weekly 25-30gal water change.