Hydro setup to maximise the space in my grow tent`

Hello, I'm currently growing in a grow tent which is 0.7mx0.7mx2m at the minute i'm using an NFT tank 205 which is only really big enough for two plants(well the because I lst them). It also takes up just over half the size of the grow tent which I feel is suited to 4 plants but I can't fit another NFT in there and was wondering if anyone was using a simillar hydro system that would let me grow 4 plants in those dimensions. I'm not really interested in going for pots and soil as hydroponics is so easy to control the nutes ph etc. As a last resort was thinking for my next grow to do a bit of reading and set up a scrog attached to the frame of the grow tent and just get my two plants to fill that but I've never done it b4 and I'm growing from seed and the two plants Im growing are showing an indica and a sativa pheno which i think could cause problems in a scrog. Any opinions much appreciated.