Substrate Free Tank Husbandry (Bare bottomed)
Hi, I am upgrading my 55 gal tank to 90 gal tank. I am going to replace all new sand, is there any issue with that? Actual water upgrade is only 20% more. Also, I have some left over dry sand from my 55 gal tank when I first start it. It's OK to mixed 2 different types of dry sand for my new...