Setting Up Your Crayfish Aquarium
A beginner's guide to building a crayfish tank around one idea: make it escape-proof, then make it interesting.
Crayfish Care
Feeding, molting, and water basics.
Start With the Lid
Here's the one thing every new crayfish keeper learns the hard way: crayfish are escape artists. They climb airline tubing, filter intakes, power cords, and even tank silicone. Before you think about substrate or decor, plan a tight-fitting, weighted lid with every gap covered.
Get that right, and the rest of the build is fun.
Substrate, Hides & Hardscape
Substrate: sand or fine gravel, 1-2 inches deep. Crayfish love to dig and bulldoze, so expect them to redecorate.
Hides: at least one cave per crayfish, PVC elbows, terracotta pots, rock caves, or driftwood tangles. A hide is essential for safe molting, not optional decor.
Hardscape: keep rocks low and stable. Crayfish dig under structures, so set stone directly on the glass, not on substrate, to prevent collapses.
Plants: crayfish treat live plants as salad and construction material. Use cheap, fast growers (hornwort, anacharis), floating plants, or quality silk plants if you want lasting greenery.
Cycle Before You Buy
An aquarium needs 2-6 weeks to grow the beneficial bacteria that process waste. Adding any animal to an uncycled tank is the #1 cause of early losses.
1. Set up the tank, filter, and dechlorinated water.
2. Add an ammonia source (fish food or bottled ammonia) and seed with bottled bacteria to speed things up.
3. Test until ammonia and nitrite read zero and nitrates are climbing.
4. Do a partial water change, then order your crayfish with confidence.
Already have an established tank? You're ready now.
More Guides
Tank cycled? Time for the fun part.
Pick the color crayfish your new setup deserves.