So how do we avoid it? Don't do it! However, if you want fish from different places then there's a simple procedure to follow. It can involve two batches of fish that have simply been purchased from different shops. I need to stress that this is not an Asian/German 'thing', as it's often referred to in the hobby. Keeping Discus successfully is made easier by eliminating the known risks and there's conclusive evidence that sometimes, when two batches of fish from different sources are put in the same tank, it can have devastating results - with one set becoming very sick in just a few days. In my opinion the answer is no, but if that didn't happen the hobby would grind to a halt.
You shouldn't mix fish from different suppliers/countries Your best course of action is to seek the advice of your chosen Discus supplier, but an increasing number of keepers are considering an RO filter a product very much of the past. Some aquarists acclimatise their Asian Discus to UK tapwater, but top breeders such as Jeffrey Tan advise soft water.Įuropean-bred Discus, however, are quite happy and will even breed in harder water - the reason being they have now been tank-bred over several generations and have adapted to it. Some areas of the UK have soft water on tap, but, even then, it would be wise to run it through carbon.Īsian Discus are also raised in soft water, so will appreciate the same water preparation for wild Discus. Wild Discus will require soft, slightly acidic water and generally the only way to achieve this is to use a reverse osmosis filter. Much will depend on the water your fish have spent their lives in prior to reaching your tank. Beliefs passed through the hobby may not be necessary, beneficial or even accurate - as you'll discover: It's said they need RO waterĪll Discus will live in water prepared by a reverse osmosis filter - but do they all need it?
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