I just bought prazipro from my LFS and followed the directions on the bottle. Pretty standard and mild stuff.
For wormer I have used a could things over the years. With discus I found Levamisole worked by far the best. I bought some off ebay, it's called prohibit.
From discus forum:
Prohibit Dose Recommendations
Total weight 52 gr
Total active ingredients (levamisole) 46.8 gr
Total active ingredients (levamisole) % 90.00%
Prohibit is 90% Levamisole 10% filler
Recommended Dosage 100% Levamisole per
www.loaches.com Dr. Roy Yanong 2mg/liter or 2ppm/Liter
To get 1 gram you have to use 1.15 grams of Prohibit 2.3mg/Liter = 9mg/gal
Tank Calculations @ 9mg / gallon
10 gallon tank 100mg
15 gallon tank 150mg
20 gallon tank 200mg
30 gallon tank 300mg
40 gallon tank 350mg
55 gallon tank 500mg or .5 gram
65 gallon tank 600 mg
75 gallon tank 700 mg
90 gallon tank 800 mg
100 gallon tank 900 mg
110 gallon tank 1000mg or 1 gram