Coco Hempy Bucket Questions?

I am going to try a few 5 gallon coco hempy buckets with 2.5" perlite reservoirs and the rest 100% coco.The nutrients I will be using are canna coco A&B, rhizotonic, cannazym, canna boost and canna PK 13/14.I also have Cal-Mag+ but I am not sure if I will need it my tapwater is only 40-60 ppm at .5 conversion.Are there any drawbacks to transplanting clones straight into 5 gallon buckets? I would rather not have to transplant several times.
 
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