Help bout to start indoor

i have purchased 10 lowryder #2 seeds from attuidte should come soon i also have a 400-watt HPS and 2 rovling fans fox farm organics for nutes also have ph meter, themometer what else do i really need?
im also getting silver mylar from ebay 5$ a fat roll.

Any help would be apperciated
Thanks

the only thing i can think of is to get a MH conversion bulb so you can veg properly and still use your hps ballast.

but you can go without the MH bulb too.just read something for light distance, propper watering, light cycles, how to feed with nutes, etc. you may need more knowledge

we'll help you out with whatever we can. Peace!!! Cheetah

Get good soil, its extremely important cuz its were all the magic happens.

Get Fox Farm Oceanic Blend - organic with tons of worm castings

A good soil-less mix mixed with extra perlite is good enough on the soil IMHO. If this is your first grow remember to flush your plants at least once per month.