sick weather loach
My Weather Loach seems to be ill, thought Iíd post here in case anyone has any advice.
Heís been swimming erratically (a lot of twisting around/spinning) with major trouble balancing, often lying upside down or on his back. Occasionally he will stop and start to float for a couple of seconds before twisting around again. I think something is wrong with his swim bladder. Heís also gone very pale on one side of his face and occasionally seems to gasp as if having trouble breathing. This has been happening for about a week, there were no changes to their living conditions that I can think of that would have caused this.
Heís in a tank with one other loach. The other loach is fine, weíve had them both for around 10 years and theyíve not been sick before. Iíve done a big water change over the last couple of days (70% total) but he doesnít seem much better. His balancing improved for a day but this morning heís been twisting around and laying on his back again. Usually he hides 24/7 by burying himself but recently he just lays in plain view, usually propped up by something. We tend to change the water monthly.
Some information on their living conditions:
Filter: Eheim Aquaball 180 Interior Filter
Tank: 200 litres (44 gallons)
Ph: I believe Ph is 7 but Iíve ordered a kit to test Ph and nitrate and will update this post when the kit arrives. We fill up jugs with tap water and leave it out for 24 hours before changing around 50/60%, been doing this monthly for years.
Diet: flake food, occasional bloodworms and occasional peas.
Any help would be much appreciated as Iíve had these two for so long and have grown very attached to them, he really seems in a lot of discomfort/pain at times and itís hard to see him in this state. Sorry if my information is inadequate Iím quite new to this, feel free to ask any questions!