I vividly recall the first mature I set stirring a 55-gallon tank. I walked into the local pet store, full of hubris and a slightly too-large coffee. I grabbed three bags of adequate river stones. I thought, Yeah, this looks about right. It wasn't. It in fact wasn't. By the era I got home and rinsed the dust out, I had barely covered the glass. It looked subsequent to a desolate moonscape, not the lush Amazonian paradise I had promised my vanguard tetras. previously then, Ive realized that guessing is for losersor at least for people who with making three trips to the accretion in one afternoon. You need an aquarium water volume calculator substrate calculator that actually accounts for reality, not just some preoccupied "rule of thumb" scribbled on a napkin.
Lets acquire genuine for a second. Most people will tell you the customary "one pound of gravel per gallon" rule. Im here to tell you that regard as being is in point of fact garbage. Why? Because a 20-gallon "long" tank has a certainly different footprint than a 20-gallon "high" tank. Volume doesn't flesh and blood upon the floor; surface area does. If you desire to know what amount of gravel accomplish you actually need, you have to end thinking just about gallons and start thinking not quite square inches and severity goals. Its basic geometry, even if we all hated math in high school.