It is usually not recommended to use only distilled or purified bottled water in an aquarium, because it's "too pure" (all the minerals are removed) and the fish can become either sluggish or die. (Whether or not this is the actual cause of death, I unknowingly killed my first goldfish this way. RIP, Luke!) Bettas do not need extremely soft water. However, RO or reverse-oxidation water is said to be safe to use, and is recommended by some betta keepers (I've never tried it, so I don't have an opinion either way), but only if it's mixed with harder water. There are also commercial products which claim to add the impurities back into the water, but I've never felt adventurous enough to test them out on one of my guys. They've survived enough human error already! Dechlorinated tap water or dechlorinated bottled spring water that's been left out and open for at least 24 hours is usually considered to be best. If you choose bottled water, call the company that makes it and ask what purifiers they add. Test the pH, spring water is not always 7.0! Well water sometimes contains heavy metals, take a water sample to your local fish store and have it tested. If you live in a city or a large town, you'll probably need a dechlorinator that also removes chloramines, which are the product of chlorine and ammonia bonding. (Call your local water utility and ask what they use.) Chloramine removers break this bond and render the ammonia harmless to fish. Chloramine will not "evaporate" in merely 24 hours! Both chlorine and chloramines are toxic to fish and will kill or poison a fish if they're not removed. There are many commercial products out there that will remove chlorines and chloramines, and some also claim to bind metal ions. The latter are not recommended to use if a fish is being treated with a medication whose active ingredient is copper sulfate, as it may render the medicine useless. Other dechlorinators claim to "help" the fish rebuild their stress coat, but there is some contention over whether or not they cause gill damage (especially ones containing aloe.) I used to use these products and didn't notice any damage to their gills or gasping, but I use a very basic dechlorinator now, primarily because of the copper sulfate issue. My personal feeling is that it's the fish's job to repair their own stress coat (and most of the time I was using those products, they had no visible damage anyway) and I'd rather not risk doing harm.
I just recently got a new Bumble Bee male betta fish and I noticed today that one of his gills is not opening as he breaths/puffs the other open. His gill does not look inflamed or red, and there’s nothing that I can see holding it shut. He seems to be doing fine, but I just wanted to know if this was a serious thing and how to treat it if it is.
Betta fish --red gills? | Yahoo Answers
What is the reason why my betta fish has red gills?
Fish gasping for breath, or seeking air close to the top of the tank and at the water’s surface, is one of the clearest signs of ammonia poisoning. In appearance, they may seem to be bleeding as their gills change colors, becoming red or light purple. As with other betta fish diseases, it can also result in extreme lethargy, with the fish lying at the bottom of the tank with closed fins.Generally swollen gills can be caused by Nitrate Poisoning or Infection, or even a combination of the two. These are both usually caused by poor water quality though a number of other factors can contribute to the fish getting them. Do a 30-50% water change as soon as possible, adding the (conditioned) water back slowly so not to shock the fish. Start treating her with a broad spectrum antibiotic use tetracycline or ampicillin, preferably the latter if the betta looks like she's having trouble breathing or swimming. Aerate the water and reduce her food intake or even fast her, and add a drop of methylene blue to the water. Do small water changes everyday there after, really little, like 10% water volume until the chemicles in the tank are balanced -> Ammonia 0.0 Nitrites 0.0 Nitrates Below 50 ppm When you say she looks like she was punched in the eye, do you mean to say her eye is swollen also? This could be signs of other disease or infection.