CaribSea South Sea Base Rock for Aquarium - 40 lb - Natural Rock for Aquascaping, Ideal for Saltwater Tanks, Enhances Aquarium Design & Supports Aquatic Life

This product is well worth the price. It is man made rock and a great beginning substitute for live rock. Make sure to rinse well and it can go straight into your aquarium. It can be made into live rock over time and is a perfect addition to a basic saltwater aquarium. It comes with many medium size 5 by 8 inch rocks, It was enough to create a nice reef wall in a 75 gallon tank. I would definitely buy it again!

Just purchased two boxes of this rock for my new 125 gallon saltwater tank set up and I am really loving the look of it. I have always purchased live rock for the beneficial aspects of it, but recently my live rock purchases have come with unwelcome hitchhikers which is irritating after a while. Live rock can also be a task to position in your tank without toppling over. This rock goes together like puzzle pieces and I feel as though I will not have to worry as much about my hippo tang being crushed by toppling rocks since she loves to nestle herself in between crevices (I do not like to glue live rock together because I move it around too much due to corals). For the most part I received some pretty large pieces (by large I would say football size) but that was no problem for me as I have a larger tank. You can also use a hand saw to cut down the rock if you so choose. I did start to clean off the rock before placing it into my tank, but all that is on the rock is sand so that will obviously settle after a while. If you are adding this to an already established tank I think I would take the time to clean that extra sand off so your tank is not cloudy for hours. Two of the rocks came broken but honestly it did not hurt anything; I placed the larger part on the sand bed and used the smaller part to stack. I even had small broken pieces at the bottom of the box that I was happy about because I can glue corals to them in the future.

I honestly never write reviews, but I’m actually very impressed and extremely satisfied with this rock for my aquarium. Came with big chunks and small chunks. You can easily stack them up. I’m using mine for my African cichlids tank. Looks great!

This rock is perfect for African cichlids. A lot of reviews complain about the rocks being chalky upon arrival but this is honestly no problem at all. I unboxed the rocks, individually sprayed them off with a hose, then added them to a large bucket and ran water through them for about 20 mins maybe emptying the cloudy water out of the bucket 3 times. Then soak them over night and give them another rinse in the morning and they will have your tank as crystal clear as it was. They’re also good for the pH of the water because they calcium carbonate. They’re also really easy to stack and place which I enjoyed. I didn’t bond them because I will be rearranging the rock about once a month to keep them for claiming territories. Luckily, this rock makes is so easy to create different beautiful aquascapes. ALSO. If you go buy this rock in town at any pet store or aquarium shop it is running 35$ for 7lbs. This deal is 90$ for 40lbs. Well worth it.

Its man made base rock. Love the rock and love the price. One thing to note is that you NEEEEED to soak this in saltwater to get all the silicates and excess material out before you put it in your tank. soaking this rock in saltwater for weeks (or impatient people can cut the time down by digging out the soft material by hand) will bring out all the holes and caves in the rock that are covered in soft material that would just leach into your tank potentially causing a small tank crash. I did this with my first man made base rock and it killed my trumpet coral, plating monti, and a mushroom (like $30 total so it wasnt a huge loss). If you give this rock time to soak you will love the results as it is full of caves and crevices that look amazing in the tank.

The rocks are very clean, and time will tell if they leach phosphate or not. There is no dead matter that the eye can see, just rock. As others mentioned, they arrive a little beat up because it's just a box of rocks - nothing to try to prevent them from banging against each other during transit. That said, I did receive all decent sized pieces - about 10 pieces in a 40lb box, all about the same size. I bought these because I need them right away and do not have time to clean pukani myself. The rock has a similar look to pukani, and will look fine in my reef tank - I'll just keep an eye on phosphates, but my bet is that there won't be anywhere near as much as I would get with dry pukani because at least this is just rock, no visible organic material.

A few months ago my wife bestowed upon me the gift of a "saltwater aquarium" which, in truth, was just an empty glass box, a pedestal, and whole lot of work. Fast forward 2 months and I'm now writing a review about rocks. I'm not a rock conseguire, or a rock expert, but these seem to be some pretty good rocks. Lots of texture and holes. Good shape and size (large and medium). I bought 80 lbs of rocks and while I didn't weigh them they certainly felt like 80lbs. If I ever find myself with the need to buy rocks again I'll certainly buy more of these.

Very happy with my shipment. Rocks were double boxed and pieces were large and very nice. I pressured washed to clean without any problems. Rock is somewhat lightweight and fairly easy to chisel if you like to make your own custom shapes or nooks and crannies. I weighed it and it was exactly what it should be. Good quality, 5 stars would definitely buy again.

good quality and price

Great rock lots of crevices and spots for bacteria to grow the sizes were pretty decent but alot of small pieces came in my order was hoping for a few large pieces but over all I just went with the flow and put the rock in my tank