The guy at the pet store said you can put bettas in with other fish.. but I'm wondering If I can put him in with my 2 oranda goldfish and my Plecko just wondering if anyone knows anything they don't have water conditioner in their tank but there is in my betta bowl the one I'm thinking of putting him in with the other fish is a 30 gallon tank with a filter and an air pump, it has so many places for him to hide and enjoy please let me know! below are pictures of the tank and the betta I'm thinking of putting in.
It's hit and miss personality-wise. Some goldfish will try and eat betta tails, some bettas may nip at goldfish.
The temperature difference is a concern too though. Goldfish prefer ~60 while bettas like ~80. If you don't have a heater for your betta anyway (ideally you should), you can do it, just try and maintain ~70 so neither fish is TOO far outside of their comfort zone.
No, bettas are tropical and have many different requirements. I would recommend putting water declorinator in your goldfish tank, and removing the pleco if it is a common pleco. common plecosthumus can get to be up to 2 feet long, way to big for your tank. For your tank, only 2 goldfish are suitable.
Actually goldfish don't need cold water; they can deal with a wide variety of temperatures. Comets and commons can deal with temperatures as low as 33F and as high as 88F. The fancy varieties don't do well when the temp drops below 65F or goes above 85F. The problem with goldfish at warmer temperatures is their metabolic need increases which means they need to be fed more to be kept in good condition. More food means more waste, and since goldfish are messy enough we try to keep the temperature down to prevent more waste.
But that aside, goldfish and betta don't make good companions. Goldfish are very messy and need powerful filters. These filters will blow around a betta in the tank. Goldfish will gladly eat a betta. My goldfish are large enough to swallow a betta whole. Goldfish tanks are also messier than your average tank; in these conditions a betta will not thrive and will probably get finrot a lot. Goldfish also need hard water to thrive. Betta are soft water fish.
That tank is just large enough for two goldfish. Adding a pleco in there overstocks the tank. The pleco will grow about 10 inches and needs at least a 55 gallon tank.