Contact

Have a question, spotted a mistake, or want to suggest a new calculator or guide? I'd like to hear from you.

I read every message, but I can't always reply quickly. If your fish are in trouble right now, start with the cycling guide or the cloudy water fixes, and test your water. A 30–50% water change with conditioned, temperature-matched water rarely hurts and often helps while you work out the cause.

Bought Your First Aquarium and need help with your download? Reply to your receipt email or write to the address above.