The reason I was asking also was people on here have helped bettas at the brink of death that were thin, had bad ich or fungus, even parasites sometimes, and so I was discouraged when she died as i've seen here as proof it's possible for them to survive and heal 100%, was curious what I had done wrong.
Alot of Questions coming your way!
What was water like did you ever test the water?
How often you did water changes
Yellow stuff in water hmm.... I am thinking this was IAL water(Indian Almond Leaf water) or just disgusting water hmmm..
white spots on the fish where was all the spots located?
Are you 110% sure it was ick! here is why I asked this question
Sounds like it ended up with Columnaris, i think it was mistaken for ich and its easy to do in the beggining, and I am guessing you had it both ways internal and external! You treated for ich and raised the temp bad move with Columnaris. When you raise the temp of the water you do 2 things, 1 is you help spread the infection of the Columnaris and quickly to, 2 you speed up the motabilism of the fish, meaning it eats more becomes more active. This is my guess and probably others will agree. Reason I go this route is because treating for ich is not the same for Columnaris the treatments are different depending on what med you where using, meth blue can't get rid of Columnaris! All it does is slow the process down. I think the meth blue all it did was help slow the process down of the columnaris and not cure the actual problem, you needed something like
Maracyn, look on the box for gram-NEGATIVE, Negative is a certain type of antibiotic that kills different things than positive, using something like this probably would have saved the fish. This treatment should have been recommended first before thinking it was ich, its common for betta fish to get this and not so common for betta's to get ick
Copied from a site hope this helps explain it, it explains it better than I would ever do
Often mistaken for a fungal infection because of its mold-like lesions, Columnaris is a common bacterial infection in cultured fish, particularly livebearing fish and catfish. Its name is derived from columnar shaped bacteria, which are present in virtually all aquarium environments. The bacteria are most likely to infect fish that have been stressed by such conditions as poor water quality, inadequate diet, or handling and shipping. Columnaris can enter the fish through the gills, mouth, or via small wounds on the skin. The disease is highly contagious and may be spread through contaminated nets, specimen containers, and even food.Columnaris can be external or internal and may follow a chronic or acute course. Lesions in chronic cases progress slowly, taking many days before culminating in fish death. In acute cases the lesions spread quickly, often wiping out entire populations of fish within hours. High water temperatures accelerate the progression of the disease; however lowering the water temp will not affect the outcome of the disease.
Symptoms:
White spots on mouth, edges of scales, and fins
Cottony growth that eats away at the mouth
Fins disintegrate beginning at the edges
'Saddleback' lesion near the dorsal fin
Fungus often invades the affected skin
Rapid gilling in cases where gills are infected
Most Columnaris infections are external, and present first as white or grayish white spots on the head, and around the fins or gills. The lesions may first be seen only as a paler area that lacks the normal shiny appearance. As the lesion progresses it may become yellowish or brownish in color and the area around it may be tinged red.
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Prevention
Maintain high water quality
Provide fish with a nutritionally balanced diet
Medicate fish prophylactically before moving them
Disinfect nets and other equipment before using
Because the bacteria thrive on organic wastes, it can be controlled by regular water changes and vacuuming of the gravel. Proper diet and maintaining good water quality in general will keep the fish from being stressed and therefore susceptible to infection. To avoid spreading the bacterium, nets, specimen containers, and other aquarium equipment should be disinfected before each use. Small quantities of aquarium salt can be used to prevent disease in livebearer aquariums. When fish are being shipped or moved, they may be treated prophylactically with antibiotics or by feeding them medicated food.
Treatment:
Change water
Vacuum gravel
Add aquarium salt
Treat with copper sulfate or antibiotic
Discontinue carbon filtration during treatment
External infections should be treated with antibiotics or chemicals in the water. Copper sulfate, Acriflavine, Furan, and Terramycin may all be used externally to treat Columnaris. Terramycin has proven to be quite effective both as a bath, and when used to treat foods for internal infections. Salt may be added to the water to enhance gill function. Livebearers in particular will benefit from the addition of salt, however use caution when treating catfish, as many are sensitive to salt.
Hope it lighten up your day ^^