holy! you veg for a long time man. 4 weeks is plently. no need to transplant , unless i guess if ur going to continue to veg. really though 5 gallon pails seem like enough. especially for indoor. u must be trying to grow indoor monsters lol. anyways i only veg for 3 weeks in 3 gallon bags and but i use a 4x4 tent , so space is limited. good luck with the monsters