Vumdua 4 Pcs Aquarium Divider, Grid Divider Tray Egg Crate Fish Tank Divider Filter Bottom Isolation with 8 Pcs Sucker Clip for Mixed Breeding (Black)

My last couple of times I have used dividers like this I've done so via buying parts from 2-3 different sources.. the egg crate plastic dividers from location A... and the sliders/suction cups from location M... having to go to Location R if I wanted to use more than one size of grate opening in say the bottom and the top of a tank.Mind you, the dimensions of the aquariums used by 95% of those who have fish have been the same for at least the last 45 years. Admittedly the slate bottom/ metal frame tanks from the early 1900's - 1960 ish, came in, not different dimensions when dealing with bread and butter 10/15/20H/20L/30 gal tanks and upward, but they did have tanks that were in between the norm and in the case of those they didn't shard the same L x W x H numbers as their counterparts. So, truth be told, excluding oddball tanks, a 55 gallon tank has been 4 ft long, 13 inches deep, and 18 inches tall for the past 100+ years. A 40 breeder was introduced at 3 x 18 x 18... with really only the center number being the one that anyone crafting dividers need concern themselves over.I thought that if I went to everything all coming from one source that meant the company had figgered out how inches work. NOPE.. for whatever reason they are still certain that something crafted from "break before you bend" hard plastic with a groove of 1/8 inch will somehow slide onto a grate that is 1/4 thick without something snapping off, bending to the point of being a kewl new toy for your fish to play with before swallowing and gutting themselves on.Does anyone know why the idea of making these egg crate dividers with accompanied clamps seems to be so illusive? It seems like an easy enough fix to me depending on which direction you want to take things. First thing to make note of at this point is that EVEN if you are patient enough and enjoy doing the work that the company seller this stuff as dividers for aquariums should have done.. or should be doing... Unless you redesign the busted design you've been sold when you finally shave down the plastic grates to the point that you can place the clamp/suction cup on the outer edges in order to adhere the divider in place to your aquarium... You guessed it fam.... You will notice that an 18 inch divider DOESN'T fit into an 18inch wide tank when the suction cup clamps add over an inch to each side making it a 20 inch divider.SIDE note: 20 inches front to back are the inside dimensions of no factory made tank EVER.12 inches.. yep... 16 inches yep... 18 inches you bet... 24 inches bingo again. BUT 20 inches - even 19 inches when dealing with non-shaping clamps won't work.. and to risk putting them in at an angle when, once again, the suction cups themselves have zero play in them, will hold for small non aggressive fish.. WHO HAVE NO NEED for the divider but fish who have a greater desire to kill than their desire to propagate the continuation of their own species... Not so much. They will always find a way to tear the divider down.. or move it enough out of the way, or ram it enough times to cause a gap to appear at where ever the weakest twist was to begin with. Not just that, but they will sort it out so that it happens while you are working, sleeping, vacationing, or my favorite that moment in time when "I SWEAR everything was fine when I started mowing and I was barely outside for more than an hour when I came back in to find that the male had crossed and killed all 3 of my females" happens.I tried using these on a 20H, 29, 30, 40-50-and 60 gal breeders, and my 75 gal. each of them the same end result of USELESS. I can't really see any way to use these as they are packed and sold. If one could location a pliable clamp/suction cup combo.. say where the suction cups are on an arm which could be mounted indented into the side of the grates the full size of the holders. Maybe.I think the problem is that the companies who make dividers make them correctly for fitting the tank but useless for why were are currently using them. To keep male from being able to kill female while being fully open enough for the male to spray the eggs and for the female to be able to lay her eggs at, near, or we hope ON the grate. So what needs to happen is we stop messing with making the dividers that have to have a clamp added to them and make a strip that can be attached firmly to the inside of our tank which, with still some effort needed, the egg crates slide into from top to bottom.These are completely useless unless you are intending to remodel the intended design.

These are great pieces for anything you need them forI’ve read other reviews stating too flimsy but my opinion is not that at allGood quality grids with accessories to attach togetherHighly recommended item for ya

good，i order two time .i want order more.but this is no more

The clips to not fit the divider, they are way too narrow. Disappointed.

Great value compared to others, no complaints

I bought two packages of these to connect together to place on top of my turtle aquarium. All the pieces are warped and the eye holes to connect the grids don’t line up properly. Of the 8 pieces I bought, only two connect to each other. The suction cups hold no suction and don’t fit to on the grids whatsoever the grids. Absolutely useless product.

Bought for 40 gallon gecko tank, doesn’t snap apart like it says have to use a knife or scissors. Even then broke apart uneven complete waist of time and money

Our item was broken when we got it

Works amazingly for the fish.