Answer: I think the number one problem with houseplants is overwatering and that might be the problem with your plants if the tips of the leaves are turning brown. When the potting soil remains soggy wet it excludes oxygen and plant roots need oxygen as much as they need moisture. Try dumping the excess water out of the trays and withholding water until the top half-inch of soil is dry. Then water thoroughly but don't water again until the top of the soil dries out. If you catch it soon enough and allow the soil to dry out a bit between waterings, the roots may have a chance to recover.
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