🦞 How to Set Up a Pet Crayfish Tank
Crayfish are bold, curious crustaceans best kept one to a tank — they are territorial and may fight or eat tankmates. Give a single crayfish at least a 10 to 20 gallon tank with a generous footprint, since they roam the bottom rather than swim.
Lid it down. Crayfish are escape artists that climb filter tubes and cords, so a secure, gap-free lid is essential. Provide several caves and hides — they need somewhere to retreat, especially when molting, the vulnerable time when they shed and regrow their shell.
Keep the water clean and cool. Crayfish are messy, so use a solid filter and do regular water changes; most do best at room temperature without a heater. See our freshwater aquarium setup guide and low-maintenance pets guide.
🛒 Recommended supplies
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🧽 Cleaning & maintenance
The main job is regular water changes. Each week, use a gravel vacuum (siphon) to remove about 20–30% of the water along with waste from the bottom, then refill with fresh water treated with a dechlorinator so it is safe. Scrape algae off the glass as needed and rinse the filter media in old tank water — never tap water, which kills the good bacteria. Test the water so you can catch problems early. Never do a full strip-down that wipes out the filter bacteria; steady partial maintenance keeps the water stable and your crayfish healthy.
Cleaning supplies for this habitat. Affiliate links — we may earn a commission. The $/$$/$$$ badges are a rough budget guide, not live prices.