Shoal & Stem

One-tap maintenance logging, smart reminders for every task, and Finn, your AI aquarium expert, keeping your tank thriving.

Shoal & Stem is the freshwater aquarium journal hobbyists actually use.

Whether you're keeping your first betta or running a high‑tech planted scape, Shoal & Stem helps you stay on top of your tanks — without spreadsheets.

SNAP, SCORE, AND LOG YOUR TANKS • Scan test kits with your camera. The AI reads your parameter pads in seconds — pH, ammonia, nitrite, nitrate, GH/KH, phosphate, even copper and iron — so you're not typing numbers by hand. • Score your tank's health. Get an at‑a‑glance number across factors like stocking, water quality, equipment, maintenance, plant cover, and ecosystem maturity. • Track water changes. Log volumes, get reminders, and see how consistent you've been. • Photo journal. Document your scape over time with notes and dated photos — snap a full‑tank shot straight from the camera, and rotate any shot with a tap. • Archive retired tanks. Break down a scape without losing it — archived tanks keep their full journal, photos, and history.

ASK FINN ANYTHING Finn is your AI aquascaping companion — versed in aquarium care, plant biology, fish compatibility, water chemistry, and aquascaping technique. Finn looks at your real water readings — now including copper and iron, so it can flag copper that's risky for shrimp and snails — and answers anything from "why is my plant melting?" to "what fish can I add to my 20 gallon?"

PLAN YOUR STOCKING The Stocking Calculator tells you if your tank is overstocked. Pick species, check compatibility, get a balanced bioload number, factor in your water‑change routine, and let Finn weigh in on your plan.

CONNECT WITH OTHER SCAPERS • Browse community tanks and see each keeper's fish, shrimp, and plants up close • Inspire (heart) tanks you love • Comment, follow, and chat • Forum for deep‑dive aquascaping discussions

WHAT'S FREE Everything. The app is free with unlimited tanks. No subscription. No paywall on core features.

PRIVACY‑FIRST We don't sell your data, share with advertisers, or run third‑party analytics SDKs. See our privacy policy at shoalandstem.com/privacy.

Questions? Email hello@shoalandstem.com or visit shoalandstem.com.