Besides its fish, an aquarium's most important component is its water. Although colorless and odorless, aquarium water
heavily impacts the overall health of your fish and your whole system. Dirty water not only makes the aquarium a murky and hassle-filled experience for your fish it also might foster the growth of harmful bacteria, fungi, and other harmful microorganisms.
Even if the water is clear, it might still pose serious health effects on your fish's if the water you're using comes from your faucet. Regular municipal water has chlorine and other chemical additives. While this water kills off bad bacteria, they also knock out good bacteria which your aquarium might need for a natural nitrogen cycle (your fish eat food, they excrete nitrites, good bacteria turn toxic nitrites into nitrates, your plants then eat up the nitrates). This might result in an ecological imbalance for your system. Another problem with using tap water is the high amount of dissolved calcium and minerals in this type of water.
Untreated, this "hard" water creates crusts in your tubing, pumps, and other parts where the water condenses and leaves only a mineral residue. Hardwater residue builds up quickly and is a hassle to remove. To prevent this problem use a Replacement Filter Cartridge for Aquarium Pharmaceuticals Tap Water Filter from Pet Store
. This filter connects to your faucet and deionizes tap water. Use this water to prevent calcium and mineral build up in your aquarium.
Ready-to-use replacement cartridge for the Tap Water Filter. Easily connects to Tap Water Filter to continue making perfect deionized aquarium water.