You can, but most tap water for maranta plants works poorly because of the additives it carries. The trouble starts small. A thin dry rim shows up along the leaf edges a few weeks after you switch, and it spreads from there. Maranta plants are picky about water in a way that tougher houseplants are not, so the same water your pothos shrugs off can scorch them.
The two main culprits are fluoride and chlorine. Both build up in the soil over time, and the plant draws them into its leaf tissue with every drink. The minerals collect at the leaf margins, where water exits the plant, and that tissue dies first. This is why classic prayer plant brown tips form a crispy edge rather than spreading across the whole leaf.
Fluoride does the most damage. NC State Extension notes that fluoride-sensitive plants burn at the leaf tips and edges when levels run high. Maranta sits firmly in that sensitive group. Many city water systems add fluoride on purpose, so your tap delivers a slow dose with each watering. Chlorine and chloramine pile on top of that. The result is a plant that looks tired and edged in brown even when you water it on a perfect schedule.
The good news is the fix is cheap and the plant bounces back. You have a few solid options for what to pour instead.
Filtered water for plants is the easiest upgrade for most people. A basic carbon pitcher filter strips out chlorine and trims the mineral load, and that alone stops the worst of the burn. Distilled water is the safest bet since it holds zero additives, though buying it by the jug adds up over months. Collected rainwater is free, soft, and exactly what these plants drink in the wild, so set out a bucket next time it rains.
If you want to keep using the tap, fill a watering can and let it sit uncovered overnight. Chlorine off-gasses into the air within 24 hours, which takes one problem off the table. One catch holds: this trick does nothing for fluoride. Fluoride does not evaporate, so a city tap with added fluoride still carries it the next morning. Sitting water helps with chlorine alone.
Worried about cost or hassle? You do not need a fancy filter setup. A $30 pitcher covers a single plant for a year, and a rain barrel pays for itself the first storm. Even distilled water runs about a dollar a gallon, and one Maranta sips a small amount each week. The expense is tiny next to replacing a plant you scorched. Most people who switch say the leaves look better within a month, and that is enough to make the swap stick.
Water temperature matters too, so let your clean water reach room temperature before it touches the soil. Cold water straight from the fridge or tap shocks the roots and can stress an already-strained plant. Warm or room-temp water keeps the roots calm and lets them take up moisture at a steady pace. This small step costs nothing and pairs well with whatever clean source you choose.
Switching your water source is step one, but you also want to clear out what has already piled up. Flush the soil every couple of months by running water through the pot until it drains freely from the bottom for a full minute. This rinses built-up salts and minerals out of the root zone before they can cause more harm. Do this with your clean water source, not the tap that started the problem.
For the leaves that are already damaged, trimming is fine. Snip the brown edge away with clean scissors and follow the natural shape of the leaf so the cut blends in. The browned tissue will not turn green again, so cutting it is purely for looks. Give the plant a few weeks on better water and the new growth comes in clean with no crispy rim at all. That fresh, unmarked leaf is the clearest sign your water swap worked.
Read the full article: Maranta Plant Care: A Complete Guide
