1000w DE Organic STRETCH!!!

This is my current setup , 1000 DE HPS (Dimmed to 750w) and six pots with living soil
Temps go around 20°c to 25°c and RH 30-50
Question here is , im having trouble because my plants are stretching.
I'm just looking for tips to maximize yield

To maximize yield build a double trellis net snd grow one strain at a time and single harvest vs perpetual

For 1000 watt living soil grow I would recommend 9x7 gallon pots. Or 12x 5 gallon.
or 4 x 15 gallon pots. Something like that. Adjust veg time to fill in net almost full then flip the whole tent