Tell us about your setup and we'll let you know if your fish have enough room to thrive
Your Setup
Tell us about your water type, fish, and tank — we'll do the rest!
💡 Stocking guidelines vary by species. Koi need 250 gallons each, fancy goldfish 20–30 gallons, bettas need at least 5 gallons alone, tropical fish roughly 1 inch per gallon, and marine fish need generous space. Our AI uses species-specific rules for every fish type!