I currently have about 55# of Caribsea Aragonite- Seaflor special grade reef sand in my 55 Gal FOwLR
setup. I am planning on adding another 40# so that I have a proper DSB
and have a few questions.
1) Can I just add to the top of the current substrate?
2) Can the fish stay in the tank when I add the new substrate?
3) should I rinse the new substrate before adding?
4) Is this grade sand OK for sand sifters?
Any helpful suggestions welcome.