Question
I have a healthy anthurium sitting in a saucer with 1/2" water.  It is in very indirect light.

Recently the "roots" that cling to the  to a special type of water?  Right now  it is basic tap  rock have whitened - should I reduce amt of water; or switch water.

Thanks

Answer
Molly, WATERING  I would use distilled water as you may have chemicals in your drinking water.

While Anthuriums are able to handle dryness around the root ball, they need to be watered thoroughly and allowed to dry slightly before watering again. Allowing the plant to dry out will greatly slow down the growth cycle. Drying out can also cause the tip to burn and root damage, while over watering can also cause root damage and sudden yellowing of leaves.

LIGHT

Anthuriums as a rule (indoors) will take about as much light as you can provide them with-but not direct sunlight. Lower levels of light will slow down or cease flower production. The foliage type species will tolerate lower light levels as they grow in some of the shasiest areas in their natural habitat. Leaves emerging under lower light may stretch and/or become distorted.  kathy