No one asked what type of water are you using? Tap? ro
Have you tested your new SW
and top off water for nitrates? Any way to add a small fuge? I always had some nitrates until I added a 15 gal
tall fuge, Now for years 0 nitrates.
Base rock would be the cheapest way out and like stated it will become live over time and there will be no die off to worry about.
what brand of tank is it? you sure its all tempered glass?