Cloudy water is not uncommon in a new system. It is usually caused by a bacteria bloom due to overfeeding, overcrowding, or adding fish too quickly. It is important to provide enough food without overfeeding the fish. Most fish should be fed 2-3 times per day, but only as much as the fish will consume in 2 minutes. If you have a cloudy tank, do one or two 30% water changes and reduce the feeding amount.
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