Colu

It a difficult as your can't say for sure what happened it would be difficult to dispute it if their saying the meds were the cause

It's possible they were in a weaken state and the medication pushed them over the edge or it could be osmotic shock if the water from the place they came from had big difference in water parameters

Definitely Green tiger barb

Hopefully that will sort them out

Your kH is on the low side it could be the low minerals content in your water I would add some crushed coral to increase your kH in the short term I would add some wonder shell it could also be the planaria treatment I run active carbon to remove any remaining medication

What your kH and do you use a dechlorinator like prime when doing water changes

Isn't their a risk of hybridisation between the rainbow darters and the new edition

They look like Ramshorn snails

Just noticed you have high nitrates they can effect fish immune system that Couple with the ammonia could be the cause I would do daily water changes and add prime to detoxify any ammonia and nitrates till ammonia at zero nitrates are below 40

It's looks like an injury it could also be the start of a growth if he's not eating I would Qarantine and treat with kanaplex in food

You could do a course of maracyn in food it's more effective In food as maracyn only treats external infection unless add to food just in case something else is going on he's how I dose maracyn in food I use a quarter of a packet of maracyn one table spoon of pellets one scoop of seachems focus 1 cap of garlic guard a few drops of water mix well feed twice a day for 7 days store any leftover medicated food in the fridge @Bjorn

Sorry to hear that I would do water change and monitor your other fish Dropsy isn't contagious need to look at the root cause which was probably the ammonia and nitirte spike keep doing daily water changes and add prime to detoxify any ammonia or nitrites

It's possible it's particles that they are stirring up ich looks like small grains of salt over the body usually starts on the fins it's difficult to no for sure I would just monitor them closely for the next couple of days

The reddening can be a sign of an infection setting in that why I would do a course of maracyn2 in food

I wouldn't recommend mixing that many medication what I would do is water changes and add active carbon for 24hr to remover the other medications before treating for anchor worms

It's more than likely damage due to nitirte spike what I would do is a course of maracyn2 active is minocycline in food I use a quarter of a packet of maracyn2 1 table spoon of pellets one scoop of seachems focus 1 cap of garlic guard a few drops of water mix well feed a small amount twice daily for 7 days store any leftover medicated food in the fridge

It's difficult to tell off that picture if it's anchor worms he some information increase you need to treat

Good to hear he's recovering

You could put a in their sponge filter or just use an air stone if you have some seeded filter media that would help

With most tetras it depends on lighting and good quality food will improve they colour lemon tetras can look washed out under bright lights

I would just treat with ick x for fungal infections it always best to Qarantine when it's only one sick as exposing healthy fish to unnecessary treatment is good in the long run

High levels of nitrates can effect fish immune system coupled with the ammonia are probably the cause daily water changes and add a double dose of prime to detoxify any ammonia or nitrites till it gets to zero if you can get a 5 gallon tank or you can use a plastic tote to Qarantine him the most effective treatment I have found for Dropsy is kanaplex dose the tank to treat any possible bacterial infections metroplex in food feeding a small amount twice a day for 3 weeks treats aeromonas bacteria a common cause of Dropsy and aquarium salt 1 table spoon for 2 gallons to help reduce the fluid buildup or you can do Epsom salt baths 1 table spoon for 2 gallons for no more than 15 minutes @ChanMan

It's possible he has internal crush injurys I would Qarantine and add a small amount of aquarium salt 1 table spoon for 3 gallons the the will aid Gill function and add essential electrolytes to help him recover and monitor

What are your water parameters and can you take a picture of the sick fish and how long has he had symptoms such as pineconing

I would raise the temperature to 80F I wouldn't treat with melafix or primafix they are oil base herbal treatments and not good for fish with labyrinth organs such as Bettas gourami's aren't very effective treatment they are like a mild antiseptic treatment at best I would start feeding him again a small amount of frozen daphnia or brine shrimp and add a small amount of aquarium salt to his 1 table spoon for 3 gallons they Will aid in Gill function and add essential electrolytes is he having any trouble swimming such as swimming to the top of the tank and just floating back down