I vividly remember the first era 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 customary river stones. I thought, Yeah, this looks just about right. It wasn't. It truly wasn't. By the epoch I got house and rinsed the dust out, I had barely covered the glass. It looked gone a desolate moonscape, not the lush Amazonian paradise I had promised my unconventional tetras. before then, Ive realized that guessing is for losersor at least for people who subsequently making three trips to the accretion in one afternoon. You obsession an aquarium substrate calculator that actually accounts for reality, not just some absentminded "rule of thumb" scribbled on a napkin.

Lets get real for a second. Most people will say you the agreeable "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 very vary footprint than a 20-gallon "high" tank. Volume doesn't liven up on the floor; surface place does. If you want to know what amount of gravel do you actually need, you have to stop thinking just about gallons and start thinking approximately square inches and depth goals. Its basic geometry, even if we all hated math in high school.