Penn-Plax Aqua Life Tank Divider - Super Size Aquarium Separator - Instantly Converts One Tank into Two, Easy Setup for Fish Breeding, Isolation, Aggression Control & Water Flow 11 3/8 x 17 1/2 Inches

I have a smaller 5 gal aquarium I was planning to set up for two male bettas. I haven't got the bettas yet, they are due to arrive this Tuesday. But so I have a glo fish, 2 ghost shrimp, 2 algae eaters, 2 snails and a couple of aquatic plants. This product has been great at keeping firmly stationary in the center of my tank. I had to do some cutting to modify it to fit, but it was not difficult to do at all. I have a small gap at the top of one end of the divider, but so far it has been great at keeping the glo fish and the ghost shrimp on their prospective sides of the tank. The snails and algae eaters have been able to sneak back and forth to each side of the tank which I have no issues with. I have read some of the others reviews about using this for bettas, so I am a little leery how well my two bettas will do once they are let loose in this aquarium. I am hoping they will not be over stressed with being able to see through the divider. But just in case, tomorrow I am heading to purchase a 25 gal aquarium I had already planned to purchase. So if they get to stressed, I will just move them to the larger aquarium and use this or another like product to separate them.

I just recieved this item and put it together very easy. I am using it to seperate two different types of baby cichlids in my 55 gallon tank. This product does not even touch the walls on side of the tank. The babies can still make it by both sides of the so called seperater. I would not recommend this product to anyone. I think that it should be taken off the market and this company should be taken to court for false advertisement! The only thing this is going to stop from getting to the other side pf your tank is the fish fecies that gets caught on the center of it.DON'T WASTE OR TIME WAITING FOR THIS PRODUCT TO COME IN THE MAIL...BETTER YET DON"T WAIST YOUR MONEY BUYING IT!

A couple problems with this divider. The side brackets/supports curve, and do not fit snuggly to the wall of the aquarium. This allows a door way on each side for fry of all ages to slip thru. Every morning I get up to see how many can be caught and moved back over as I'd like to keep them from being eaten. Another issue is overall height. We have a standard 55 gallon. We also fill the tank to its capacity for proper water flow, and to reduce splash noise. This gives 2 more doorways to even large fish to pass over and eat the fry.Height should be increased, it can always be trimmed.Side brackets/supports should be made of a medium firmness rubber like material, something that could give a decent squeegee effect and stay against the sidewalls with no gap.

I have a 55 gallon tank with a 3-D 1/4" rock background. We have an Oscar on 2/3 of the tank and guppies, shrimp, and tetras on the other 1/3. This divider is sturdy enough (it is a plastic material NOT mesh) to hold back our hungry oscar, while still allowing flow from one side of the tank to the other. We have an external canister filter, so our input on one end of the tank and our output on the other. I haven't noticed any build up of debris on the divider. I was afraid our 3-d rock background would cause an issue, but the divider just bows a little in the middle which is fine. The only issue is that it could've been just a few inches taller. Luckily we have a lot of sediment so that it can fill in the gap at the bottom. I just have to watch my fish and make sure they don't burrow under it. I do wish that is wasn't bright blue.... We strive to make our tank very natural. We have aragonite sand, mopani driftwood, live plants, and a 3-d rock background, so the bright blue tank divider kind of takes away from that. Overall, a great buy for the price!

built my own aquarium lid

I was pretty disappointed with this product. Probably the lowest quality product I have bought for any of my 7 tanks. Although I did get it to work, kind of.The clips that hold it in place are metal, and moving them around can scratch the plastic frame of the aquarium. They also interfere with my glass canopy, preventing it from shutting tightly, and leaving a gap that will cause more evaporation of my tank water. Using multiple suction cups on the sides would be a way better design than employing these metal clips.Also, on the sides, the divider is just supposed to be jammed in with no suction cups or any way of ensuring a tight seal on either side. I secured mine as best I could with a pile of gravel on either side holding it in place, but I expect to lose some of my tiny black convict cichlid fry to big fish on the other side when they inevitably find gaps. I already had one small tiger barb wiggle through from the other side, and he faced an immediate beating from the protective father of the convict fry. Also, my banded leporinus jumped over the top, so you have to make sure divider is positioned high enough that it is above the water, or alternatively, that the canopy touches it when closed. Doable if you have a deep substrate layer in your 55 gallon, as there is just enough divider material to eliminate the risk of fish jumping over or sneaking under.Anyway, if you want a divider for breeding purposes, this isn't a great one. If you just want to separate one nasty, big fish from the rest of the fish in your tank, it may work ok. Still, I could envision a big fish eventually knocking it loose if they get emboldened to keep ramming into it, as the material is so flimsy.

It was supposed to keep my two most aggressive fish away from each other. Mind you I purchased in April. The other night we noticed that the screening was rotting and there was a hole in it. Tonight my Blue Peacock Cichlid went right through it and began fighting with the Green Terror. Not good. One of my fish will probably be dead in the morning because I don’t have a spare tank. I’m going to contact the company as well. I feel as though some type of compensation should be given . If I do have a dead fish in the morning, someone will be charged.

it was easy to install and works great. I am using it to separate fish and shrimp habitats. all the little beasties seem happy.