Originally Posted by twinkiedooter
Good heavens what a smell a fish tank has. I know from experience having had 24 different fish tanks in my home years ago in Florida was like. I can recommend that you immediately throw out all the water from the tank and rinse it out with fresh water. I would then start over with fresh water. If you have a water filter like a Brita run the water through that. Then put the water into the tank and let it there for at least 3 days using the water filter and air stone turned on. After 3 days I would put in some "starter fish" usually very small inexpensive fish and let them live there for at least a week. Algae eaters are very delicate fish and should not be added right away to a new aquarium.
You should get a plecostamos fish. They are the sucker fish that clean up the tank walls. I have had just about every kind of fish in my aquarium days so I'm almost an expert.
I had a whole house water filter that used charcoal to clean the water with. That was my secret to being able to keep the fish tanks. Oh, algae is natural for fish and if your tank has green algae on the sides, it's normal. Also do not place the tank where it will get direct sunlight. This could probably have caused the enzyme to stink.
You can get guppies in different tail configurations or gouramis. They are easy to keep. Stay away from discus fish as they are very delicate and not easy to keep. You may have good luck with angel fish. They are interesting and pretty easy to keep.
If you added gravel to the tank be sure to have rinsed it out when new at least 15 minutes. If you are going to redo this tank I would suggest rinsing it out at least 10-15 minutes before adding in new water. Definitely get rid of the old stinky water and start over.