I agree with the above responses.
But on a side note, you said you bought various things to help pH / etc. Really you dont need to be adding chemicals/etc to adjust your pH level. I've seen alot of people here recommend letting your fish adjust to your tap waters pH, rather than use chemicals and risk fluctuating it (fish are sensitive to pH changes).
You'll still want something to dechlorinate/etc your tap water but it sounds like you already have that. I've never used that brands you mentioned so I can't speak for them. Prime (made by Seachem) seems to be the most popular water conditioner (used for water changes/etc), and is cheap.
http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=4057
That should be all you'll need for water conditioners (someone pls correct me if I'm wrong).
But yeah, that tank is too small for plecos really.
But on a side note, you said you bought various things to help pH / etc. Really you dont need to be adding chemicals/etc to adjust your pH level. I've seen alot of people here recommend letting your fish adjust to your tap waters pH, rather than use chemicals and risk fluctuating it (fish are sensitive to pH changes).
You'll still want something to dechlorinate/etc your tap water but it sounds like you already have that. I've never used that brands you mentioned so I can't speak for them. Prime (made by Seachem) seems to be the most popular water conditioner (used for water changes/etc), and is cheap.
http://www.drsfostersmith.com/product/prod_display.cfm?pcatid=4057
That should be all you'll need for water conditioners (someone pls correct me if I'm wrong).
But yeah, that tank is too small for plecos really.
If people on here got on your case its just because we love our fish and want others fish to survive. We were all noobs at one point. In fact back when I started I thought letting the water evaporate and then filling the tank with water once it got to a certain point was doing a water change! I still dont know how I didnt kill any of my fish! So it sounds like you are on the right track for saving your fish and doing research. As for buying fish, once your new tank cycles I'd find another place than Petsmart. Good Luck and write more if you have questions!