The question is,how do they look?Pics would say a million words man.If they are still green n spinning up nice leave it be imo.But always imo never more than 50% strength esp if your talking Miracle grow of some such similar Chem ferts..But me personally Id make no more than a 20-30% mix Maximum.thats 20-30% of full strenght.so a pretty light mix.but if they are green n look healthy,id leave em be.with Autos less is most always more untill ya gain a soild understanding by just looking at em ya know to add or decrease the nutes.