Slow Growth in DWC? HELP!

hi all,

i sprouted my seeds like 2 weeks ago and they are growing at a slowwwww ass rate.
their roots are already dangling inside the reservoir
they are being vegged under a 100w CFL 6400k

what are possibilities for slow growth rates?

are the temps too low?
are there not enough nutes? ( i dare not put too much because 1 of them( celtic berry) is showing signs of burn but the 2 WW are doing just fine.)
are they not getting enough oxygen? (there's plenty of misting going on when i lift up the cover to look at the roots)

They grow slow at first and then explode

well this could be a list of problems its a little hard without knowing grow temps, althought anywhere between 75/85f is ok as they like it hot.

Make sure roots are not exsposed to light as this is a no no as roots dont like light.
Half solution is only needed in the first 2 weeks after that they should get full nutes but this is all down to the plant it will tell you when and what it needs.
If you have an ec stick then check after two days, have your nutes in the tank dropped or are they the same reading, if there the same then your Plant has used more water than nutes which means you have nute block which will slow your growth like a motherfucker you need to flush with ph balanced water rembering that your ph range should be 5.5 to 6.00 at most what every you have been keeping it stable at is what you should flush with for about two days.
If nute levels have dropped then your plants are feeding correctly change mix every 1-2 weeks as per norm make sure you have fresh air pumping in your system

they are probably about to start vegging and you will see abundant growth. 100cfl...

what are possibilities for slow growth rates?

are the temps too low?
are there not enough nutes? ( i dare not put too much because 1 of them( celtic berry) is showing signs of burn but the 2 WW are doing just fine.)
are they not getting enough oxygen? (there's plenty of misting going on when i lift up the cover to look at the roots)

Click to expand...

temps could do it, but probably not, as a large range of temps is fine

more nutrients won't speed up growth, only use the right amount

oxygen for the roots, do you have air pump?

looks smth like that now

thats about close to 2 weeks old?

yup im using double air pump , plenty of misting

dont have a ppm meter so that might be a problem?

im scared to put too much nutes inside so im probably under feeding them but some of them show yellowing at the tips...