Smallish update.
Tank has had a week now of just clean water and rest, and unfortunately it has not helped things. Water readings are 0 and 0 for ammonia and nitrite.
The knives are doing increasingly poorly. The flashing has not subsided and they are more and more apathic and sometimes rest sideways on the sand for prolonged periods.
Yesterday I saw that their pectoral fins are clamped down to lines and somewhat bloodshot.
Theyre reaching a critical point of whatever it is that they have, and I cant afford to not do anything.
Going by the clamped and bloodshot fins, and the lack of results from the courses of Prazi, I went out and bought some strong antibacterial medication for them.
It might be that right now, a secondary (or primary) infection of bacteria is what is hardest on them.
It feels like im fumbling completely in the dark about what the correct course of action is, and every action has several pros and cons.
I gave them all a medicated bath this evening before returning them to the tank. I held my breath as I placed them in the bath, as I reckon they had about a 50/50 chance of just dropping dead on contact with the water. But they didnt seem any worse off than when I fished them out. The gourami was allowed to tag along for the bath, as shes been increasingly blushed in her gills and thats not normal for her.
I dont think fish just get bacterial infections for no reason, unless there is an underlying cause or the fish are very weak. The knives were very weak in the store and the owner told me she had almost lost all of them during acclimatization. So they were weakened before they came to me. But their intense itching/flashing doesnt sound like bacteria to me, and thats what it started with. The apathy came later. I also feel like its now slowly spreading to the others in the tank, as ive seen the pygmy corys swim a bit erratically and possibly flashing a bit. And now the blushing in the gourami. The gourami has been what I can only describe as depressed, since she lost her second husband early this year. So its not super easy to gauge how shes doing, since shes been moody and weird for a long time now.
Im really not keen to dose the entire tank with antibiotics, because I would kill off my entire filter colony.
I still feel like there is an underlying issue here, im just not 100% sure what it is. I picked up a stronger anti-parasitic medication today as well, but it kills both snails and shrimp.
So if im gonna use this, I will need to keep all the shrimp in a seperate tank for at least a month or two. The active ingredient is Diflubenzuron, which is a chitin inhibitor.
It claims to kill fish lice (Argulus), anchor worms (Lernaea), skin flukes (Gyrodactylus), gill flukes (Dactylogyrus), tapeworms (Cestodes).
Fish lice, anchor worms and other large parasites can be pretty quickly ruled out as they would be clearly visible on the fish.
Unlike Praziquantel, I have not found anything online about aquarium populations of gill flukes / Dactylogyrus being resistant to this medication.
It would be nice to have all of these ruled out though, especially the flukes. Unless I have a change of heart, I will likely undertake the quest to get out all the shrimp tomorrow, and get them set up in their own tank for a bit.
I am mentally preparing for the knifefish not to make it.. Its very sad and I wont get any more if I cant save these four
🙁
I want to end the update with some good news and not have it all sad and bad news though.
All the fishstick eggs hatched shortly after the last post, and the tank is now absolutely crawling with fishsticks.
There were a few days I hardly dared put my hands in the tank, as there were tiny fishsticks covering pretty much every surface including the glass.
Now they are a bit older, they are more actively in search of food in the tank and will move out of the way if given some warning.
I cant say that I have lost any of them so far, as the place is still literally crawling with them.
The two male grey fishsticks had a bit of a spat earlier this week when the second male suggested that maybe they could make it into a threesome in the cave, and then the first male could leave and let him get on with it alone. The first male took great offense to this.
They got so angry fighting they turned red
To be honest, at some point I lost track on who was who, but one male was crowned victorious and returned to the waiting female.
One of the firstborn fry observed the whole thing and probably needs therapy.
To top it all off, as of yesterday and today, the male is laying on a double brood, as both females have visited his cave. I assume its the same male as the first spawn.
He seems to be preferred by the females, and the other male is not good about claiming a cave and trying to be inviting for the ladies.
At the rate this is going, I wont have room for much water in the tank by new years. I was almost hoping he would take a few weeks off, kick off his shoes and rest his weary fins a bit. 😉