Official UndergroundAquarium.com blog posts — from fishkeeping tips to product reviews. Join the discussion, share your thoughts, and dive deeper with the community.

Introduce yourself and your tanks! Let the community know who you are, what you’re keeping, and what you hope to learn. Everyone starts somewhere—this is the place to make your first splash.

Kick back and talk about anything. Fish-related or not, this is the social corner of the forum. Share memes, ask off-topic questions, or hang out with other hobbyists.

Show off your aquarium builds! Post your tank's progress, aquascaping projects, or before-and-after photos. Inspire others and document your journey.

Rehome your fish or gear, or find something new. List fish, plants, or equipment you’re selling or trading. Be sure to include your location and shipping options.

Build a lush underwater garden. From low-tech tanks to high-light aquascapes, discuss plant care, CO2 systems, fertilizers, and tank layouts for thriving greenery.

From shrimp to snails and everything weird. Chat about nano shrimp tanks, pest snails, crayfish, or any offbeat species that don’t quite fit the usual categories.

Everything about freshwater species. Share your experience with guppies, bettas, cichlids, tetras, and more. Ask questions, discuss tank mates, or showcase your favorites.

Explore the saltwater side of the hobby. Discuss marine tank setup, coral care, reef-safe fish, salt mixes, and the ins and outs of maintaining healthy marine life.

Raising fish? Start here. Share breeding techniques, fry tank setups, and species-specific spawning advice. Learn how to care for delicate fry and maximize survival rates.

Build it right, keep it thriving. From equipment choices to water quality, this is your hub for creating and maintaining healthy aquariums.

Keep your water crystal clear and balanced. Learn how to cycle a tank, test water parameters, manage algae, and schedule maintenance like a pro.

Spot symptoms early and act fast. Ask for help identifying sick fish, get treatment advice, and share experiences on quarantining, medications, and disease prevention.