Hello all. Sorry for long post but this is a ridiculously odd/curious case. I have had the most frustrating and confusing symptoms and problems in my tank for a few months now. I have a 1 year old, heavily planted, Dirted Tank. Water parameters are good and stable, p.h. 7.3, ammonia zero, nitrite zero, nitrate less than 5 PPM
....in the same range they have been in since cycling. Tank inhabitants are....or should I say were. 6 harlequin rasboras, 3 peacock gudgeons, 1 male Betta, 11 pygmy corys..everyone gets along great. The Betta minds his business and the gudgeons don't seem to even notice him. A few months ago I noticed a lot of my fish were flicking their gills/fin area on hard surfaces...almost every species. Thought I had an ICH outbreak but there were and have never been any visible signs of ICH or any other fungus or bacterial infection. I began finding a dead cory cat every week or so although they all act fine besides the flicking. no visible physical signs of distress, no redness, no discoloration, no nothing. Water parameters still tested fine. My betta began having rapid fin loss, however no discoloration like fin rot....in fact the ends of his fins were clear like growing/repairing fins should look like but they grow a few centimeters then disappear again over and over. he acts just fine like nothing is wrong. My rasboras started flicking like crazy....over a one week span I lost 3 of them due to jumping out of the tank in the middle of the night as if water conditions were horrible (have since put lid on)...but again. water tested fine, did frequent water changes...all that. All remaining fish have ZERO signs of distress but continue to flick. I stumbled on another members post that I cant find again who had almost every symptom I have had....and they claimed his culprit was grapevine Driftwood! Son of a b*&@h I have grapewood Driftwood in my tank too!! He claimed grapewood can develop some sort of fungus that is harmful to fish.....has anyone else ever heard of this? Could this one little stupid piece of wood in my tank been the culprit to months of stress?!?! I have scoured the web for info on grapewood and found a few mentions of a newly recognized fungus that can harm fish but I can find NO information about it or what it is even.