Hi all,
One of my L129 had a cloudy eye a few days ago, water changes & a little salt cleared it up, but yesterday I noticed what looked like fungus on him. Started medication however today after coming home I found them all dead, even the color morph) in their caves.
Sorry to hear of your loss, my suspicion would be that it is an oxygenation and water quality issue, rather than a specific disease. A lot of plecs like
Hypancistrus spp. are rheophilic fish, they live in water which is very fast flowing and well oxygenated, they can't cope with falls in the level of oxygen that won't harm other fish. Oxygen levels that are sub-lethal will lead to some of the problems you have experienced, whilst any sudden fall in oxygen level will lead to death.
Oxygen deficiency very frequently relates to biological filtration, because the conversion of NH3 - NO2 - NO3 is an oxygen intensive process. Have a look here at Shane's PC article: <
http://www.planetcatfish.com/shanesworl ... ved+oxygen> and at this one that I wrote based upon our work on "land-fill leachate", at present hosted by "Plecoplanet" "
Aeration and dissolved oxygen in the aquarium" here: <
http://plecoplanet.com/?page_id=829>.
0.25 ammonia (api testing kit has never given me a 0 rating), 0 nitrates, 0 nitrites
Not every-one will agree, but throw the kits away, they don't tell you any thing useful, for example you definitely don't have 0ppm nitrate (NO3). I wish this wasn't true, and there really were cheap and quick test that worked, but there aren't. I have access to £100,000's worth of analytical kit (with fish tanks in the lab next door), and even with that it is really difficult to get repeatable, meaningful results for many parameters. The only easy to use, cheap meter that gives reliable, repeatable results is a conductivity meter.
I use the Biochemical Oxygen Demand (BOD) concept for tank management, again we can't actually measure BOD, but it makes tank management a lot easier. Details towards the end of: <
http://www.planetcatfish.com/forum/view ... hilit=+BOD>
water changes & a little salt cleared it up, but yesterday I noticed what looked like fungus on him
Again I know other peoples views will differ but I can't see any use for salt (NaCl) with fish from soft water. These fish come from water with low conductivity and very few salts of any kind, so why should salt be therapeutic? it doesn't make any sense to me, I've read the suggestion that it helps with osmotic balance etc.
This links to a very good water quality article "Water Chemistry: Osmoregulation, Ionic Imbalance & pH" by Joe Gargas at: <
http://www.tbas1.com/Exchange/The%20New ... d%2011.pdf>.
cheers Darrel