Cure white poo wasting disease (Advanced fish keeping)

White poo + not eating + wasting disease has a few potential causes:
Bacterial infection (some may be virtually untreatable however ie mycobacteria however that starts showing spinal deformities and lesions which reveals it)
Or
Round worm
Or flatworm/tape worm
_____
Good idea is to treat with metronidazole (ie metroplex)
+
Levamisole (Avitrol plus tabs, 1 tab per 10L, 24hr black out, gravel vac. Repeat dose 1 or 2 weeks later)
+
Praziquantel (Blue planet fluke and tape worm)
If the fish are eating soak food in garlic (Seachem Garlic Gaurd) and feed a pea size portion of mashed garlic (or however big to suit fish size). Dosing Seachem vit C also helps immune system of fish and Seachem Nourish and Hufa soaked food.
New Life Spectrum Hex Shield is also a good option for a mild to medium amount of prevention used every few weeks as it has metronidazole and epsom salt.