Do’s and Don’ts of Fish Tanks in Rainy Season

The monsoon brings joy, greenery, and a pleasant change in weather, but it can also create challenges for aquarium hobbyists. The rainy season affects temperature, humidity, power supply, and water quality — all of which are crucial to your fish tank's health. Following the do’s and don’ts of fish tanks in rainy season can protect your fish and keep your aquarium running smoothly.

At Blessings Aquarium, Pune, we’ve helped 1,000+ hobbyists handle seasonal changes with confidence. Here's our expert guide for managing your tank this monsoon.

✅ Do’s of Fish Tank Maintenance During Rainy Season

1. ✅ Use a Reliable Heater

Monsoon weather brings cooler nights. Install an adjustable heater to maintain consistent temperature, especially for tropical fish.

2. ✅ Check Water Parameters Regularly

Rainy conditions can alter your tank’s water chemistry. Use test kits to monitor pH, ammonia, nitrate, and temperature at least once a week.

3. ✅ Install a Backup Power System

Frequent power cuts can be dangerous for aquarium life. Keep battery-powered air pumps or inverters ready for filters and aerators.

4. ✅ Improve Tank Ventilation

Humidity rises during monsoon. Ensure adequate air circulation around your tank to prevent fungal growth on cabinets and lids.

5. ✅ Clean Filters and Substrate More Frequently

Rising humidity promotes waste buildup. Clean your filters and gravel more often to maintain good water quality.

6. ✅ Use Covered Tanks or Lids

Rainwater or insects can enter open tanks. A secure lid or cover glass prevents contamination and evaporation.

7. ✅ Feed Less but Smartly

Metabolism slows in cooler weather. Feed

 to avoid leftover buildup.

❌ Don’ts of Fish Tanks in Rainy Season

1. ❌ Don’t Ignore Power Cuts

Even a 30-minute outage can drop oxygen levels. Don’t wait — prepare in advance with alternate power sources.

2. ❌ Don’t Place Tanks Near Damp Walls or Windows

This invites mold and temperature fluctuations. Always keep your tank in a dry, stable corner.

3. ❌ Don’t Add Rainwater to Your Tank

Rainwater might seem natural, but it's untreated and acidic. Avoid using it directly in your fish tank.

4. ❌ Don’t Skip Water Changes

It might be raining, but your fish still need clean water. Continue your weekly water change routine, ideally 20–25%.

5. ❌ Don’t Overcrowd Your Tank

Less oxygen and higher waste in monsoon can stress fish. Maintain proper fish-to-water ratio.

6. ❌ Don’t Forget to Clean the Tank Surroundings

Wipe your tank cabinet and electricals regularly. Moisture buildup can damage wiring and cause hazards.

7. ❌ Don’t Ignore Sick Fish Symptoms

The weather shift can cause stress or illness. Isolate sick fish and treat promptly to avoid spreading infections.

Handling the do’s and don’ts of fish tanks in rainy season is all about preparation and observation. With a little extra care, your aquarium can thrive even in heavy downpours.

Visit Blessings Aquarium in Pune for expert advice, seasonal equipment, and top-quality fish care products. Let us help you keep your aquatic world safe and beautiful all monsoon long.