lamonsas.. let me explain something to you. You've been keeping fish for less than one month, and you are telling people anything???
Arvlyn is trying to help you, and you are "dissing" the help???
Dude...get over yourself, please before you make a huge mistake.
We're giving you advice, or trying to, but...again...you seem fit to hurt your fish and waste money.
Like I said...take it SLOWLY!!!!!!
It's a lot cheaper, in the long run, if you do things right.
Were I in your shoes....and I have been... I would take the tetras back, get the platy numbers straightened out. Be careful...if you have a female in that tank...you will have babies. Have you stopped to think about that? You should, seriously, consider what you will do with the babies. Taking them to the fish store won't be an option, I'm sure.
Please....don't get in a hurry. WHat you've done so far isn't that bade...in the grand scheme of things. But, you have GOT to learn PATIENCE before you start killing more fish.
Also, understand what the LFSm Petland??, is there for. YOU ARE PLAYING INTO THEIR BUSINESS. They are here to sell you fish. Some stores are good, may be this one is, but you have GOT to be careful about what they tell you. Look, I've been told before that putting a Lionfish in freshwater is fine..."fine" But...I'd feel real bad about killing a saltwater fish that can't adapt to freshwater. How did I find that out?? Research...it'll be your best friend. But...until you slow down and start doing some...Your throwing money away.
You state you can't afford a bigger tank. Then, slow down!!! This isn't a race to see how many fish you can buy. You're supposed to stop and enjoy them. If you are always at the fish store..you're enjoying their fish, not yours.
And, please....understand who you are talking to before you start "dissing" someone. Obviously, arvlyn knows WAY more about fish than you do.
Stop getting defensive and start learning how to care for your fish and aquarium.