i'm building partitions in an old tank of mine that has been drilled on the side for pump. it seems to be cheaper to buy plexiglass and cut it then glass. I did not see glass large enough at home depot. i called a glass company and for glass pieces 18 x 20 was about $21 and for plexiglass $31. seems a lot for each partition. do i just go to home depot and buy the plexiglass they have and cut it to size or what. i'm thinking i just should have bought a new sump. looking for answers before i buy the pieces tomorrow. thanks.