You can't just keep two sharks together - they'll eventually try to kill each other. I would normally say you need a group of them, but in your case, just one. Plectos get huge. Clown loaches need to be in groups, and they get huge - same with silver dollars. Also, mollies tend to be fin nippers, and might go after your betta.
Got some decent pictures. Hope they come out well on here. What you can mainly see is our Betta with different fish. Mostly with Guppies, Tetras, Mollies, Silver Dollar and Angel fish, you can see the Pearl Gouami or whatever in the background of a few, have to look close though. Also there is the Red Tailed Shark in a few.
And so far i have one big question: Can they live together or like another month till we can get another tank or half of them?
You would have to get multiple huge tanks to be able to keep these fish. The pleco is the fish that can get 2ft long, which would be a 125 gallon. The clown loach would be a 55 gallon. Silver dollars require schools of around 6 to be happy, grow to 8 inches, so there is a 300 gallon. Ghost catfish also prefer to be in groups of 6. Angel fish grow huge to about 6 inches. Frogs are blind and will not be able to out compete all these fish for food, so the odds of him starving are really good. You really want to find out what your sucker fish are, because if it was sold as an algae eater at petsmart (which carry all the fish you bought so im assuming thats where you went), there are really chinese algae eaters and also grow up to be HUGE and aggressive, might be nice and small now, but they eventually suck to fish and eat their slime coat. I'd say keep your guppy, tetras, mollies, and get a couple more ghost catfish and you'd have a very happy community tank. Right now you have a hodpodge of community up to extremely aggressive fish in there. When you shop at petsmart/petco they have their fish color coated as to what tank youd be going for, community, semi-aggressive, aggressive. Some are HIGHLY mislabeled so do your own research. But really your going to want to find homes for these fish. Also did you read about cycling your tank properly, and how did you add these fish, as in all at once or 3-6 at a time every 2 weeks.
Alright that was really good advice, thank ya. I'm open to alot more. But ya i got all these fish at petco but there were not any stickers or anything. But i added them all throughout hte course of a month or less. About 5 at a time, letting them rest on top for a while then putting each kind in seperately. I have no idea what cycling a tank is i would be glad if you told me. But do i really need those big of tanks, that sounds ridiculous and no one would ever be able to get any of these fish without spending thousands. Also i dont get why they get along so good right now, cant they grow up and like eachother since they have been together since a young age and get feed regularly. some animals can do that, for example we also have a cat and a pitbull that get along great and even play. Fish capable of this? Haha sorry if that sounds crazy. But i am totally open to any fish advice that you guys think beginners don't get told and need to know. Thanks.
Also can you not build a fish tank? Me and my roomamte have been thinking about this latley, they are not cheap. Could you just glue the glass together if you think you were capable? Also do they not have the thick see-through plastic like at big aquariums and couldnt you build a tank out of that? Tell me if i'm missing something here..
Can't address the fish issue because I think the experts have already explained the dangers. But I can address what you just said about your pit and your cat. I had a pit rescue for years. I had a cat & 2 pits that grew up together since they were all 10 weeks old. They slept together, ate together, played together. Never one issue.....never until one day we went out and came home to a dead cat. This was 4 yrs into their lives. I knew better. I'd heard the stories, I knew. Yet, I hoped, mine would be different. They weren't. A pit bull is bred and good at what it's bred for. Can you home them with other animals, sure you can. Are there cases where it never happens? Sure. But in the end, a pit is a pit and there is nothing you can do to change that. You can't love it out of them, you can't say "but mine is the sweetest thing ever". Mine was too, mine slept with my infant child. Mine is still living happily with my ex but guess what? She's killed 3 more cats since then that were let roam into her yard....I promise you, a pit gives no warning and will snap a kitty's neck and then come lick you without thinking it ever did anything wrong.
****Sorry for the off topic rant guys.....just wanted to offer that bit of info.*****
300 gallon is overkill, I think, but you would need at least a 75 to house the plecto/clown loaches/a couple more silver dollars comfortably. What I would do is split this up into two tanks - keep the guppies, mollies, betta, neons, danios, and one shark in the 20 gallon (it would be preferable to upgrade that to a 30, but 20 would work for now). Then, move the loaches, plecto, silver dollar, and 1 shark to the 75 gallon. Get at least three - four more silver dollars and clown loaches. Add some driftwood and decorations for the loaches/plecto to hide in, and that would be a lovely tank I think. Making tanks should only be done by experienced people who have researched for a long time. Tanks are very, very easy to screw up. I would search Craigslist for a cheap 75 (make sure they prove it holds water before you take it home), and a 30-40 if you wish to upgrade the 20.
Go to the monster fish keepers forum, 300 is not overkill. And people do spend thousands on these fish. And having 4-5 8" fish in a 75 gallon tank sounds cruel when you look at. As far as the growing up together part, maybe if you were looking at the neons and angel there have been success stories. But there are just as many fatalities. You have to look at it as if it were nature, some of these fish are down the food chain to the others, its like your baiting them with delicious treats.
And for cycling tank, the basic breakdown is that fish produce ammonia from their waste products. An uncycled tank does not have the bacteria to break down the ammonia and it continues to build until its toxic and burns the gills and scales killing your fish. To cycle your tank you need an ammonia source (for you its actually having fish, google fish in cycling). Your going to need a good water testing kit (API Masterkit is HIGHLY recommended). In order for your water to be consideded safe ammonia needs to be below .25, along with very low nitrItres (also toxic to fish), and 10-20ppm in nitrAtes. You can go on about a cycle all day, but a good google search will help. To keep everything low you'll probably need to do daily partial water changes, if your tank is cycled everything but nitrAtes will be at zero. But you NEED to do this or all your fish are going to suffer.
I'm on MFK. 300 is still overkill. Personally, I would pick a 90 for those fish, but a 75 would work fine. You have to work within people's budgets - if they're going to keep these fish, which it seems like they are, the 75 gallon would house them fine. Three loaches, four silver dollars, and a plecto could be perfectly happy. They may not be the most comfortable fish in the world, but heck, I'd be more comfortable in a mansion too, but that doesn't mean I shouldn't live in an apartment in the meantime. With proper filtration and water changes, they would be fine.