Make your own, use some plastic canvas (you can buy this in all different sizes and cut to size) and use silicone to attach it to the sides of the tank
This thread here, gives you all the links and information to enable you to do this
looking at the pink mesh! this looks well nice! I could buy some, then slot one of those plastic things! cant remember what thet are called! so if im gonna stick it with silicone, Ill need to empty the tank?
Possibly - you could try it, depends on the current of the water I guess. I went for silicone as I was seperating bettas and didnt want to run any risk there would be able to reach each other, either because the divider fell or there was a gap inbetween.
Dont know whereabouts you are UK/US/europe? But in UK any good stationery shop would have some, Hobbycraft/Staples etc Got a large sheet for 99p in Hobbycraft enough to divide my 60L tanks.
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