Essential Reef
Reef hobby community + market
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Essential Reef is a community built for serious reef aquarium hobbyists.
Whether you're keeping your first nano or running a 500-gallon mixed reef, Essential Reef gives you the tools to track your tank, the market to source what you need, and a community of fellow reefers who actually know what they're talking about.
— THE COMMUNITY —
- Public and private channels for tank chat, build threads, and Q&A
- Direct messages with other members
- Reactions, replies, and rich photo posts
- Active moderation by reefers, not algorithms
— THE MARKETPLACE —
- Browse coral, fish, invertebrates, and dry goods from vetted sellers
- Auctions with flash-close rules
- Sale listings with photos, prices, and shipping details
- Buyers and sellers coordinate payment directly
— TANK TRACKER —
- Log water parameters (alk, calcium, magnesium, phosphate, nitrate, salinity, temp, and more)
- View charts of how your tank changes over time
- Track every coral, fish, and invertebrate in your livestock list
- Record growth, spawning, health events, and more
- Schedule and log dosing for additives and supplements
- Export your data as CSV anytime
— ABOUT US —
Essential Reef is built by reefers, in Florida, for the global reef-keeping community. New members join with an invite from an existing member, keeping the community focused and high-quality.
— PRIVACY & SAFETY —
- We don't sell your data
- We don't track you across other apps or websites
- You can block any user, report any content, and delete your account at any time
By using Essential Reef, you agree to our Terms of Service and Privacy Policy at essentialreef.com.
Questions? support@essentialreef.com
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- React to messages with emoji — long-press any message
- @mention people in channels, posts, and comments
- Follow auctions to get a reminder before they end, and hear when sellers you follow post new listings
- Fixed like counts not updating
- Fixed salinity (and other parameter) ranges when using alternate units
- Bug fixes and improvements
The developer, Essential Reef, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- User Content
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- ESSENTIAL REEF & CO. LLC
- Size
- 45.8 MB
- Category
- Social Networking
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
18+
- 18+
- Infrequent
Profanity or Crude Humor
Contains
Messaging and Chat
User-Generated Content
- Copyright
- © 2026 ESSENTIAL REEF & CO. LLC