Sorry. It yet. Will test soon. Looks like gill area is a little red. Definitely red to test. Did a WC the fay of death.
Betta is In a 1 gallon temporarily and seems to be doing pretty good
The betta is in a 1 gallon should I put hI’m back in the 5? He seems to have some minor fin rot. What should I do?
Definitely
ammonia poisoning. Keep the betta in the 1 gallon for now, with daily 100% water changes. Do the same for the surviving guppy in the 5. If the guppy survives the ordeal, return him to the store and give the betta the 5 gallon. Guppies are social fish and should be in groups, and should never be in anything smaller than a 10 gallon. If the guppy passes away at any point, do a complete water change and return the betta to the 5 gallon immediately.
Don't worry about fin rot right now; it's a normally slow-moving opportunistic infection that will in all likelihood start to clear itself up as the water quality improves. If it doesn't, that's something to treat after this acute ammonia problem is sorted. I would not use any medications right now unless signs of a serious infection presented. They can interfere with your tank's ecosystem and make your current problems worse. Imo they are only to be used as a last resort if no other underlying cause can be found and frequent water changes aren't helping. I have used medications in the past, and apart from phenoxyethanol for chronic, unresolving fin rot, none have helped and if anything exacerbated existing problems. I believe a particular one killed off my filter bacteria and severely disrupted the ecosystem of my tank, as it became extremely smelly and cloudy and my filter was invaded with excessive gunk, likely waste products excreted by harmful opportunistic bacteria that were left in a power vacuum after the normal microbiome was killed. I tried everything, complete water changes, transferring healthy water over from a parallel tank, but nothing worked and within a few days of a water change, the abnormal opportunists were back at large. I had no choice but to completely tear apart the tank, chucking the substrate and filter pads and leaving it empty for a good 5 months before starting again. This is a 37 gallon tank this medication did this to, so I don't want to imagine how quickly it can completely kill the ecosystem of a small 5 gallon tank like yours.
Most fish become ill with infectious ailments due to stress. If you fix the underlying problem causing the stress, the infections will likely resolve unless they are too advanced for the fish to fight off. I have seen
tetras and
cories come back to full health from some of the worst fin rot I have ever seen (entire
dorsal fins and barbells missing), with absolutely no medical intervention whatsoever. All they needed was clean water and a healthy diet.
I wouldn't wait to
test the water. Start 100% daily water changes asap.