You got all the required specification but still guppies are sensitive and needs more care.

1. Guppies can be very sensitive check their activities often with time.
2. Feed flake food
3. Use breeding traps in your Aqua tank so guppies can hide.
4. Keep guppies in 1:3 ratio like for 1 male -3 female and don’t use too many of them at 5 once or with time.
5. Keep the temperature between 75 and 84 degrees Fahrenheit.
6. Keep the tank lights on for at least 10 to 12 hour a day. Fluorescent Bulbs are good option to use.
7. I hope guppies already started breeding and don’t ever overfeed them. Change fresh water every week as algae formation need to be avoided.
8.Grind the tropical flake food to powder to feed the fry.
Hope the new guppies are growing well.

check this for any useful information:
http://www.thetankaquariums.com/product_info.php?cPath=2&products_id=8
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tank aquariums