CoCo is better in 100% form, my 3 gallon smart bags with 100% coir will be one big sponge, when root ball forms. that will hold more nutes and suppply for mire roots at a time no way im gonna add perlite and sacrifice root area, and i use Drip clean so i water every day but not on the Seedlings, they just recieved a very light mix of nutes. Plus my smart bags breath 360 degrees