10-25-2012, 10:49 AM
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Originally Posted by aemaki09
Water changes are being done 2x a week right now and the tank has been running for about a month and substrate is gravel...It is a greenish brown murkiness
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That would likely be green water, which is an algae bloom. It is caused by excess nutrients plus light, when the natural balance between these is upset. Live plants help stabilize the balance as they use the nutrients and light. Without plants, there is nothing so algae has a field day, and if the nutrients are higher than normal and there is overhead ight, some type of algae will occur. Usually this will be something like brush algae, which while a bane to those with planted tanks, it is fine in plantless tanks. But green water is a sign of significant imbalance.
I will assume this tank may be getting too much food too, perhaps? How many fish and which? (Wondering about over-stocking here.) And is a water change including vacuuming of the gravel being done every week, removing 1/3 to 1/2 the volume? How long is the tank light on?