How Much Rock Should You Really Have At The Bottom of Your Fish Tank? The optimal amount of substrate, including rock, at the bottom of a fish tank depends on several factors, but generally, aim for a depth of 1–3 inches to provide adequate space for benefici…
The optimal amount of substrate, including rock, at the bottom of a fish tank depends on several factors, but generally, aim for a depth of 13 inches to provide adequate space for beneficial bacteria… [+10181 chars]
