fish dying

Hi all, I'm looking for some help/ideas/advice please. I have a 180l tank which has been established for about 5 years. I took over the tank 2.5 years ago from my brother as he didn't have time to care for it properly with work, kids etc. Did a partial water change yesterday lunchtime around 30%...

I cycled my 10 gallon (https://www.petco.com/shop/en/petcostore/product/glofish-glass-aquarium-kit-10-gallon) tank for about 3/4 weeks and saw the spikes of nitrites and ammonia then both hit 0 and the nitrates were at a pretty good level. From what I had read, it seemed like the whole cycle was...

So I just did a 50% water change in my tank and put in a new plant, rinsed the rocks and put in fresh water. I have quite a good filter and the silt from stirring up the gravel was gone within 30 minutes. I have 3 fish in the tank for the time being: a 4-inch goldfish, a 4-inch albino...

Request Help Tank size: 20gal long pH: unknown ammonia: unknown nitrite: unknown nitrate: unknown kH: unknown gH: unknown tank temp: 24c Fish Symptoms (include full description including lesion, color, location, fish behaviour): White, “flaky” lesions (see images) Lethargy (flicking tank...

Hi, About one week ago, one of my fish (female blue ram) had passed away with little warning along with a new SAE (which was expected as it was new). That is where i thought it would end, but no. Yesterday, whilst doing my daily feed, I noticed one of my swordtails floating lethargically on...

I have a 46 gallon bowfront tank. I lost my external filter and biowheel that operated my undergravel filter system. I replaced it with an Aqueon 75 internal filter and removed the undergravel system. I did a 50% water change and used a piece of my old filter and added it to the new filter...

I just got 3 fish this week. They were all fine the first day, but one of them couldn't swim and has now died, of the two remaining one seems healthy and the other is laying at the top of the tank on its side and cant swim. Could you please tell me what is wrong and how could i help the tank? I...

What Others Need to Know to Help You When posting a request for help can you please include the following info 1. Water parameters. (ammonia, nitrate, nitrite, PH, temp', Hardness etc) 2. A full description of the fishes symptoms. 3. How often you do water changes and how much. 4. Any...

I have recently started keeping fish maybe 4-5 months. I had a problem with the first few i had. Now it seems to have come back. I had two rope fish one iridescent shark one black fin shark a crawfish gold fish and a kuhilli looca?sorry for the misspelled words. So today my one rope fish died...

I started a cycled 37 gal. aquarium about a week ago.  Since then, about half of the fish have died.  (About 1 a day.)  I am frantic--what's causing this?  Or is it just stress...?   Here are the particulars: 37 gal. aquarium temp 78-80 degrees Fahrenheit feeding Omega One Tropical Flakes here...