AqAdvisor.com
Free online calculator. Input tank size, filter, plants, fish list.
Provides bioload percentage, oxygen indicator, compatibility warnings.
Limitations
Algorithm-based — doesn't know specific behaviors of your individual fish.
Some species data outdated or generic.
Use as starting point, not absolute truth.
Real-World Adjustments
Subtract 20-30% from "100% capacity" recommendation.
Add buffer for fish that haven't reached adult size yet.
Account for breeding — pairs need separate territory.
Common Mistakes
"Pet shop says 6 will fit" — they want a sale.
Believing "1 inch per gallon" rule.
Not researching adult sizes before purchase.
- ✦Plan for the species' adult size, not pet store size
- ✦Schooling species need full school count (6+)
- ✦Territorial species need territory space, not just fish space