I agree with everyone else the less stuff you add for no good reason the better. If you want more I would suggest trying to fine some small pieces of LR with heavy encrustation (rubble if possible it’s cheaper). I find most of my growth accelerates in areas of higher flow, by placing some “seeds” in the proper places you can help jumpstart your growth. If you know someone else with heavy glass encrustation they could vacuum up a scraping for you to add to your tank but seed rock is best. Take notice of the current flow and light level in the places you’re finding growth your seeds should take root there or in similar conditions. I find regular water changes keep my CA level fine without supplements.