Whether you keep koi, goldfish, tropical fish, or a saltwater reef — Pond Pal is here to help. Free AI-powered tools, plain English advice, no jargon.
Pick what fits, and we'll bring your best next steps to the top.
Just answer a few questions and our AI gives you clear, friendly answers — no fish degree required!
Tell us your tank size, fish type, how many fish you have, and your filtration. We'll let you know if your setup is a happy home for your fish.
Check my tank →Enter your test kit readings for freshwater, pond, or saltwater tanks. Our AI diagnoses any issues and tells you exactly what to do to fix them.
Test my water →Enter your tank or pond dimensions and instantly find out how many gallons you have — and how many fish your setup can support.
Calculate my volume →Tell us how many fish you have, their size, and the current season. We'll tell you exactly how much to feed and which food to use.
Calculate feeding →Have a question about any fish or aquarium topic? Ask our AI anything — koi, goldfish, tropical fish, bettas, saltwater reefs, and more.
Ask a question →Enter your USDA hardiness zone and fish type to find out if they can safely overwinter outdoors, and how deep your pond needs to be.
Check my climate →Planning a mixed tank? Check whether your species choices get along before you buy — temperament, aggression, and water chemistry conflicts.
Check compatibility →Find the real upfront and ongoing cost of keeping your fish — including equipment, food, and the electricity bill most people forget about.
Calculate my cost →Upload a photo of your fish and our AI will look for visible signs of illness — spots, fin damage, discoloration, and more.
Upload a photo →From setting up your first tank to advanced pond filtration — our friendly guides cover koi, goldfish, tropical fish, and everything in between.
Read the guides →Whether you have a backyard koi pond or a living room aquarium, we've got you covered.
Full koi care support — tank sizing, water chemistry, seasonal feeding, disease identification, filtration systems, and pond plant guides.
Fancy goldfish, common goldfish, and everything in between. Tank sizing, water quality, and feeding guidance tailored to goldfish needs.
Bettas, cichlids, tetras, gouramis, and community tanks. Water chemistry guidance for all freshwater tropical species.
Marine fish, reef tanks, and coral setups. Our water testing tool supports saltwater parameters including salinity, calcium, and magnesium.
Our most recommended products — tried, trusted, and linked directly to Amazon for easy ordering.
The most trusted freshwater test kit. Tests pH, ammonia, nitrite, and nitrate accurately — works for koi ponds, goldfish tanks, and tropical setups.
View on Amazon →The gold standard water conditioner for all freshwater tanks and ponds. Neutralizes chlorine and detoxifies ammonia in one easy dose.
View on Amazon →Perfect for koi and goldfish in spring and autumn when water temperatures drop below 65°F. Easy to digest, highly nutritious.
View on Amazon →As an Amazon Associate, Pond Pal earns from qualifying purchases. This helps keep our tools free!
No complicated forms, no confusing charts. Just simple, friendly guidance for every fish keeper.
Enter your tank or pond details — fish type, size, filtration. We keep it simple.
Pond Pal analyzes your info using proven fishkeeping guidelines for your specific fish type.
Plain English results — what's good, what needs attention, and exactly what to do.
Follow the guidance, watch your fish thrive, and come back anytime you need help.
We believe good fish care should be accessible to everyone — not just the experts.
We explain everything in plain English. No confusing acronyms, no overwhelming walls of text — just friendly, practical help.
Our AI uses real fishkeeping standards and species-specific guidelines that experienced keepers rely on — for every type of fish.
Our core tools are completely free, forever. We keep the lights on through affiliate partnerships — so you get great advice at no cost.
We don't just say your ammonia is high. We tell you exactly what percentage water change to do and which products to use.
Start with our free tank checker — works for any fish, any setup, takes one minute.
Get Started — It's Free 🐟