Siphon Aqua: Fish Tank Tracker
Siphon Support
Cloudy about something? We'll clear it up — we usually reply within two business days.
Frequently asked questions
How does Siphon count days?
From the day of your last logged water change. Tap “Changed water today” after each change; the water in the tank picture clears, and the countdown to the next one restarts.
I changed water but forgot to tap.
Tap the tank picture (or “Adjust schedule or date”) and set the correct date — the count adjusts instantly.
What interval and percentage should I use?
Most freshwater tanks do well on 20–30 % weekly. Heavily stocked tanks need more, lightly stocked planted tanks can go longer. Rising nitrate is the usual signal to change water.
Reminders don't arrive.
Check Settings → Notifications → Siphon on your iPhone and make sure notifications are allowed. Inside Siphon, open Settings and confirm “Remind me” is on. Reminders come at the time you pick (10:00 by default): the day before (optional), on the due day, and one and three days after. The free version reminds you about water changes for one tank; Pro covers every tank and every care task.
Can I track more than one tank?
Yes, with Siphon Pro — each tank gets its own schedule, care tasks and water test log. The free version covers one tank.
How do I add the widget?
Home Screen: long-press an empty spot → “+” → Siphon. Lock Screen: long-press the Lock Screen → Customize → tap the widget area → Siphon. Widgets are part of Siphon Pro.
How do I restore Siphon Pro on a new phone?
Open Settings in Siphon and tap “Restore purchases” while signed in with the same Apple account.
How do I cancel the monthly plan?
iPhone Settings → your name → Subscriptions → Siphon Pro → Cancel. Lifetime is a one-time purchase and never renews.
Is this veterinary or professional advice?
No. Siphon is a reminder and a log. Test your water and watch your fish.