water pump size for rows

hey guys i am doing a 12 bucket rdwc but i have run into a slight problem because my t5 fits over 3 rows of 4 buckets much easier than 4 rows of 3 buckets. will this put additional strain on my water pump? it is only 264gph.

If your pump is handling 4 rows of 3 buckets well, then it will handle 3 rows of 4 buckets almost as well...though I am a little surprised it can handle either...I would have gone with at least 350 gph.