My First Two Fish Tanks

[tetraguppy]

Okay, so I have two fish tanks, both 20 litres.

My first fish tank has 11-12 cobra guppies in it, and my second has 7 orange swordtail platys.
So, I'm wondering, since I'm quite new to fish keeping, are my tanks ok? Here's some info on them:

Tank 1

11-12 cobra guppies
no filter
3 live plants and 1 fake plant
1 fake pot (for decor, they also like hiding in it)
gravel
2 months old
cleaned once

Tank 2

7 orange swordtail platys
filter
River rocks
1 huge clump of plants from their pond, 1 fake plant
2-3 days old (including fishless cycle - 24 hrs

I don't have a water testing kit but I observe my fish often and make sure everything's ok, and I make sure to look after them and feed them once a day. My platys came from a pond and don't know what fish food is so I don't really feed them, they live off of the enviroment. I also would like a 20 litre neon tetra tank, and I don't need a heater because I live in the tropics where the temperatures are ideal for the fish I own. Is there anything I can improve on that won't take up much or any budget at all? I have one spare filter, it's identical to tank two's filter. Also if you want more info or photos I can answer happily.

 

[Mowbz]

Few issues here;

Water testing kit, its a must. You really could do with an Ammonia and Nitrite test kit as a minimum, a liquid kit is better than strips.

Platys from the pond - There will have been flys, and all sorts of other bugs they were eating in the pond, that arent in the tank. Quite what they were doing in a poind however, is beyond me, Must have been a very warm one. THEY NEED FEEDING! They might no know what the food is, but put it in there, and they'll eat it once they know what it is.


I would get the second filter in the second tank ASAP, and head to the beginners resource centre and read up on "Fish In Cycling". Ive a feeling the worst is yet to come for you....

EDIT: Sorry to be so negative, but I've put it as nicely as i can....

 

[tetraguppy]

Thanks! I'll read up right now and do what it says.