One problem that often baffles, even experienced, aquarists is what causes a cloudy fish tank? The solution is not entirely straight forward as, depending on when your fish tank turns cloudy and what colour it turns, there may be a number of reasons for it happening.
Let’s look at a new tank and move forward through the tanks life cycle.
When you first set up a tank the water may well seem cloudy straight away. This is simply caused by minute air bubbles being suspended in the water and will disappear after a few hours.
A new tank is still going through the nitrogen cycle so is unable to deal with the waste produced by your fish. As the nitrogen cycle gets under way you may find the water turning milky. This is usually a sign that the bacterial stage of the nitrogen cycle has started. Bacteria start to multiply so quickly that they can make teh water appear cloudy. Although unsightly this will pass as the nitrogen cycle completes and settles down. Partial water changes of 10-15% will help to reduce this. Be careful not to over-feed any fish that you have as this can add to the problem.
If the tank is brand new and you have not yet added fish or started to cycle the tank, it may be that an ornament is reacting with the water and causing cloudiness. Are all your ornaments designed for aquariums and were they all rinsed thoroughly before you set up the tank. If one of your ornaments is dissolving, then it needs to be removed and a large water change needs to be carried out to maintain water quality.
Bogwood may leech a yellowy brown stain into the water. This will settle down over time and water changes and is harmless. The wood is simply leaking tannin to the water. Giving the wood a good scrub in clean water can prevent this. As the wood ages and starts to grow its own covering the tannin problems will stop. Water changes will gradually get rid of this dis-colouration.
There are a few things that you can do to help keep all forms of cloudiness at bay.
Do not overfeed your fish. Give enough food so that the fish can consume everything in about two minutes. Any more than this and you will end up with excess waste which can add to cloudiness problems by causing a bacterial bloom.
Keep your gravel clean. vacuum the gravel when you do water changes. Use bottom feeding fish, snails and shrimps to clean up leftover food
Do not overpopulate your tank. Stick to the inch to a gallon rule but be sensible about it. An inch of Neon Tetra creates less waste than an inch of Guppy. Also remember the snail population. This can quickly expand and they create waste in exactly the same way as fish. An occasional cull may be needed.
Rather than doing large water changes stick to frequent smaller water changes. Change half of your water in one go and you can upset the balance of the tank leading to a bacterial bloom as the cycle re-establishes itself.
Most causes of cloudy water can be solved with time and a good maintenance routine. Regular water changes will solve most water quality problems
Permanent link to this post: What Brings about a Cloudy Fish Tank and What Can Sort it Out?
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