I was able to grow very large plants in my 75gal. Discus tanks. I planted in clay pots and had a bare bottom tank. Anubias and large swords were my plants. Of course i had already been raising multitudes of fish for decades so my husbandry of tanks was well honed. My fish laid eggs multiple times a month and I had free swimmers often. BUT if you are after spawning and raising fry to adulthood this is no way near the optimum way to go about it.