I have three 12x10.75, quarter-inch thick opaque Plexiglas dividers with 20 .25" holes (five rows or four or four rows of five
These are nice dividers that came with the 20 long acrylic tank I ordered. Unfortunately, UPS didn't think I needed the tank and cracked it during shipping. I will receive three new dividers with the replacement tank so these are extras.
$5.00 each or 3 for $13.50. Shipping is $6.00 for any number. PM with any questions.
These are heavy dividers that not even the strongest Betta could move. They do not come with holders. I tried the ones below before I repacked the aquarium and they worked well. The actual blue holder is almost flush with the tank wall (about 1/8"). IMO, a Betta could not squeeze through.