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**First, breathe!** Panicking won't fix your water chemistry. The 'aggressive water' alarm means your fresh fill water is corrosive—it's leaching minerals from your pool surfaces and equipment. You likely didn't add any balancing chemicals after refilling. Did you test the water before turning the system on? OmniLogic is sensitive to pH, alkalinity, and calcium hardness. **Check these immediately:** 1. pH (should be 7.2–7.6) 2. Total Alkalinity (80–120 ppm) 3. Calcium Hardness (200–400 ppm) If any are low, the water is 'aggressive.' Add baking soda for alkalinity, calcium chloride for hardness, and pH increaser/decreaser as needed. *Always* balance chemicals before letting the system run—it's not a magic box!

Ugh, been there after my spring refill! Totally freaked out when the alarm blared at 2 AM. 😅 SplashKing's right—fresh water is like a blank slate and super aggressive. I rushed and forgot to add stabilizer (cyanuric acid) too, which made my chlorine vanish. **Quick fix:** Grab a test kit (not strips—they're junk) and balance in this order: 1. Alkalinity first (baking soda) 2. pH next 3. Calcium hardness 4. Chlorine/stabilizer last Run the pump for 24 hours after adding chems, then reset OmniLogic. It's a weekend project, but you'll save your heater and pipes from etching!

Night shift worker here—I feel your pain with late-night alarms! OmniLogic's aggressive water alert is serious; it can damage plaster, metal fittings, and the heater coil over time. **From experience:** City water is often soft and acidic post-refill. My tap water had pH 6.8 and zero calcium! You probably didn't do anything 'wrong,' just missed the startup routine. **Action plan:** - Test with a reliable kit (I use Taylor K-2006). - If numbers are off, add chemicals slowly, waiting 2–4 hours between adjustments. - Don't ignore it—corrosion is silent until it's a $$$ repair. Set a reminder for next refill!

Busy pro tip: This is why I pay for a service. But if you're DIY-ing, automate it. OmniLogic can integrate with chemical feeders—install one for pH and alkalinity to prevent this. **Short-term:** Acknowledge the alarm in the app to silence it, but *don't ignore it*. Buy pre-mixed balancing packs from the pool store (e.g., 'Start-up Kit') to dump in after refills. It's faster than measuring each chemical. **Root cause:** Fresh water lacks minerals, so it attacks surfaces. Add 10 lbs of calcium chloride and 5 lbs of alkalinity increaser per 10,000 gallons as a baseline. Test in 24 hours. Time is money; don't let this drag out.

**Update us!** Did you test? SwimSage33's kit idea is okay, but pre-mixes can overshoot—you still need to test. LagoonLegend37's caution about slow adjustments is key; rushing causes swings. Remember: OmniLogic monitors in real-time, so once balanced, the alarm should clear. If it persists, check for sensor calibration issues. And please, no 'shock' treatments until pH is fixed—it'll make things worse!

Yeah, and if you're visual like me, OmniLogic's app has a 'Water Balance' tab that shows ideal ranges. Screenshot it and compare to your test results! Also, scrub the pool walls gently—aggressive water can make them feel slimy or chalky. Once balanced, throw a pool party to celebrate surviving the scare! 🎉