First of all don't panic. If the tank really is 55 gallons rather than 55 litres (we have had members confuse the two
), the ammonia from 2 guppies in 55 gallons won't build up very fast at all. But if it is 55 litres, I would take them back as Sean suggests.
You really need a testing kit which test for ammonia and nitrite at the minimum. That way you can see when (if) you need to do water changes. If the tank is 55 gallons, I would plant the tank, wait until you know that there is no ammonia or nitrite showing up from the 2 guppies and the plants are growing well, then get more fish slowly, a few at a time, measuring both ammonia and nitrite every day. If at any time you see ammonia and/or nitrite above zero, a big water change will reduce them.
Plants use ammonia as fertiliser so if you have lots of well growing plants and add fish very slowly, you should be OK.
But before you get any more fish, I suggest you find out if you have hard or soft water. This should be somewhere on your water supplier's website. You need both the number and the unit as there are half a dozen units they could use. It is easier to keep fish that have evolved in the same hardness as your tap water. Guppies are hard water fish. it it turns out you have soft water, future fish fish should be soft water fish.[/QUOT
First of all don't panic. If the tank really is 55 gallons rather than 55 litres (we have had members confuse the two
), the ammonia from 2 guppies in 55 gallons won't build up very fast at all. But if it is 55 litres, I would take them back as Sean suggests.
You really need a testing kit which test for ammonia and nitrite at the minimum. That way you can see when (if) you need to do water changes. If the tank is 55 gallons, I would plant the tank, wait until you know that there is no ammonia or nitrite showing up from the 2 guppies and the plants are growing well, then get more fish slowly, a few at a time, measuring both ammonia and nitrite every day. If at any time you see ammonia and/or nitrite above zero, a big water change will reduce them.
Plants use ammonia as fertiliser so if you have lots of well growing plants and add fish very slowly, you should be OK.
But before you get any more fish, I suggest you find out if you have hard or soft water. This should be somewhere on your water supplier's website. You need both the number and the unit as there are half a dozen units they could use. It is easier to keep fish that have evolved in the same hardness as your tap water. Guppies are hard water fish. it it turns out you have soft water, future fish fish should be soft water fish.
I'm not too sure if i have soft or hard water though and i have both hard and soft water fish. I have 1 molly, 3 guppies, 6 neon tetras and a gourami.