Ask Our Experts

Get answers to common aquarium problems and questions from experienced fishkeepers. Topics include fish behaviour, water quality, compatibility issues and troubleshooting unusual situations.

Can I Use Bottled Water in My Fish Tank?

Bottled water can harm your fish tank by introducing unwanted salts and bacteria, here's what you need to know before using it.

How Can I Get Rid of White Flies in My FishTank?

White flies in your fish tank usually come from waste buildup, here's how to clean your filter and stop the problem.

How Do I Care for My Chilid Fish?

Set up a proper tank for your child fish and learn why bigger aquariums actually make care easier and keep water chemistry stable.

Maximum Temperature for a Biorb Tank?

Keep your Biorb tank around 24°C and choose fish that thrive at cooler temperatures to make maintenance easier.

My Blue Shark Seems to Panic: What Can I Do?

Check why your blue shark is panicking: disease, parasites, bullying, light, noise, magnetic fields, or tank stress.

My Pet Fish Is 20 Years Old Is This a Record?

A 20-year-old pet fish is unusually long-lived for a gourami, and here's what you need to know about whether it's a record.

Should I Keep My Aquarium Lights On?

Fish need darkness to sleep properly, so keep your aquarium lights on during the day and off at night.

Which Fish Go Together?

Some fish like peacock cichlids work well together, but ram cichlids need calm tankmates and Chinese sharks grow too big for community tanks.

Why Are My Fish Acting Aggressively?

Fish aggression is usually caused by illness, temperature, or too many males in the tank, here's how to figure out which.

Why Do My Fish Keep Dying?

Common reasons your fish die and how to fix water quality, disease, and stress issues in your tank.

Why Is My Clown Loach Smaller and Less Active Than Others?

Your small clown loach might be outcompeted for food by larger tank mates, but isolation and treatment can help him recover.