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Performing regular water changes helps dilute the nutrients in the pond water, reducing the food supply for algae. Aim to change 10-20% of the water weekly, and use a dechlorinator if you’re using tap water.

Organic matter like leaves, uneaten fish food, and other debris can break down, leading to harmful spikes in ammonia and build-up of nitrates, negatively affecting water quality.

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For the best results and algae prevention, adding more barley straw a few times a year is good practice to make sure there is always a low concentration of hydrogen peroxide in the pond water.

When looking to purchase barley for ponds, you’ll likely come across two different products – barley straw and barley straw extract. Barley straw extract is a liquid formula which is more concentrated and faster to act compared to physical straw. Both of these work in a very similar way.

Remember, barley straw is a preventive method of algae control, not an algae killer, so a good result from barley treatment would be less algae returning the following year. To remove large algae blooms, always use a direct treatment method and only use barley to supplement the process.

While many brackish aquariums do give the appearance of a blackwater habitat, the phrase 'blackwater' simply refers to a type of freshwater aquarium that is characterized by its tinted, tea-colored water.

The nitrogen cycle is a natural process which is responsible for the conversion and generation of different nitrogen compounds. Ammonia is a nitrogen compound, excreted by all fishes, and is extremely toxic to them.

Firstly, if you are even thinking about doing this, you are not fit to keep fish in the first place. Southern Water released a statement regarding this practice, reminding customers that the only thing that should be flushed down the toilet are the three P's - pee, poo and paper.