Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
The API Master Test kit is one of the most frequently recommended items. It is based on liquid reagents, carrying it on a plane might be a problem.
Dip stick tests are dry, and there would be no problem at all shipping or carrying them on a plane either in luggage or as carry on. There are 5-way and 6-way strips that test
Nitrite, Nitrate, GH, KH, pH and chlorine. There are separate tests for ammonia.
I find the best prices at pet/aquarium sites like Drs Foster and Smith or Big Als.
At one time I know Big Als would ship to Canada, I do not know about to Italy. But if your friend can get them to you that is not an issue.
Have you looked at what might be available in Germany? Somehow I think they may have a lot of good aquarium supplies.
What size is your tank? (liters and dimensions)
Discus and Angels are both fish that grow quite large, and a large tank is needed to keep them. 200 liters or so, perhaps a meter long, half a meter deep.