Quick Answer

Use a pillow resin filter media to remove calcium, magnesium, and heavy metals from your aquarium water, effectively lowering general hardness (GH) for soft water fish like Bettas and Discus.

Why Lower GH in Your Aquarium?

High general hardness (GH) can stress soft water fish such as Bettas, Discus, and Killis. These species thrive in water with low mineral content, and elevated GH may lead to poor health, reduced breeding success, and dull coloration.

Pillow resin filter media offers a targeted solution by exchanging calcium and magnesium ions for sodium ions, softening the water without altering pH drastically. This makes it a practical choice for dedicated soft water setups.

Trade-offs to Consider

Resin media reduces GH but also removes beneficial minerals. Monitor your fish closely, as extremely soft water can be unstable. Recharging the resin with a salt solution restores its capacity, but overuse may lead to sodium buildup if not rinsed properly.

Pillow resin is not a one-size-fits-all solution. For very large tanks or extremely hard water, you may need multiple pillows or combine with other methods like RO water. Test your GH regularly to avoid overshooting your target.

Step-by-Step: Using Pillow Resin Filter Media to Lower GH

  1. Step 1: Test Your Current GH: Use a reliable GH test kit to measure your starting general hardness. This gives you a baseline to track progress and avoid oversoftening. Common mistake: skipping the test and guessing the dosage. Always test first.
  2. Step 2: Rinse the Pillow Before Use: Gently rinse the pillow under cold running water for 30 seconds to remove any dust or loose beads. Do not use soap or hot water. Checkpoint: if the water runs clear after rinsing, it's ready to use.
  3. Step 3: Place the Pillow in Your Filter: Insert the pillow into a media bag or directly into your filter chamber where water flows through it. Ensure it is fully submerged and not blocking other media. Common mistake: placing the pillow in still water (e.g., sump return area) reduces effectiveness. Position it in high-flow areas.
  4. Step 4: Monitor GH Daily for the First Week: Test GH every 24 hours to see how quickly the resin works. Adjust the number of pillows if the drop is too fast or too slow. Checkpoint: a drop of 1-2 dGH per day is typical. If GH drops too fast, remove the pillow for a few hours.
  5. Step 5: Recharge the Resin When Exhausted: Soak the pillow in a salt solution (1 cup of non-iodized salt per gallon of water) for 8-12 hours, then rinse thoroughly before reusing. This restores its ion-exchange capacity. Common mistake: using iodized salt or not rinsing enough can introduce unwanted chemicals. Use pure salt and rinse until no salt taste remains.

Product Facts

  • PILLOW GH (General Hardness) Lowering Resin Filter Media 500ml (390 gram): The PILLOW GH Lowering Resin Filter Media 500ml removes magnesium and calcium ions, as well as heavy metals, to lower and maintain GH. It provides a convenient, rechargeable solution for Betta and soft water fish keepers who need consistent low GH without frequent water changes.

    PILLOW GH (General Hardness) Lowering Resin Filter Media 500ml (390 gram)

    PILLOW GH (General Hardness) Lowering Resin Filter Media 500ml (390 gram)