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You would for sure want to cycle any rock (our dry rock or really any other rock out there) before adding it to an already established tank to prevent any risk to your current inhabitants.
With a 90 gallon tank you are possibly going to need closer to 75-90 lbs to fill the tank well with rock. You certainly can start with 50 and purchase more later as well. Feel free to let us know if you have any further questions!
We recommend for best application to cure the rock for 6 weeks or longer to remove any decaying material. While this can be performed in the tank you will want to monitor any light and keep it dark and change 100% of the water at the end of the curing process. Additionally if cured in a separate container this can be easier and have less potential to introduce nutrients into your system. Feel free to let us know if you have any further questions.
Hope this helps!
It isn't alive (which is the best part), it is live rock that has since been dried out to kill the rocks. The bacteria required to process waste, etc, in the tank will come entirely on there own and it isn't required to seed them at all (as is common with freshwater tanks) though you could use a product like Bio-Spira or the Red Sea Mature Pro kit to speed the process up if you so desired. That way you still get awseome looking and pourous rock but without the headaches and pests (aiptasia, flatworms, etc) of live rock.
Like all of our dry rock, our Fiji Rock is free of nuisance algae and pests which can cause complete tank shut downs and is guaranteed to be free of apitasia, bubble algae, parasitic isopods, mantis shrimp, acro eating flat worms, little red bugs, fire worms, predatory nudibranchs, pyramidellid snails and other common pests.
Using Dry Rock has the following advantages:
- Low initial cost on premium types of rock.
- Pound for pound a way better value - no water weight.
- Can be shipped standard UPS ground which saves a fortune on shipping.
- Absolutely pest free. This is the most important reason. This allows you to completely avoid all of the most common aquarium pests that plague most aquarists.
How much rock do I need?
Knowing exactly how much Dry Live Rock you will need can be one of the hardest questions to answer since every tank and rock will be slightly different. A general guideline for Fiji Dry Live Rock, we suggest 3/4 pounds of rock per gallon of display tank volume and may vary depending on your overall goal for the aquascape. We always recommend purchasing a little extra dry rock to ensure that you will have enough to complete the aquascape you are looking for, any extra rock can always be broken up and placed in your refugium, overflows, and sump for added filtration.
NOTE: This rock does come out of the ocean and may have some dead material on it such as sponges or other critters. We strongly suggest soaking or curing the rock before use in an active aquarium.
Dry live rock is not available for shipment to Canada due to high tariffs. Please consider Reef Saver rock as it is not subject to these fees and is our favorite of the dry rocks available.
Way too big By Joshua on 8/18/2017Joshua wouldn't recommend this product to a friendIn the description it says a mixture of sizes. I was expecting a few big pieces but what I got was 100 lbs of basketball sized rocks. I ended up spending hours with a concrete drill bit punching holes to break it apart. I got maybe 3 small sized rocks out of the whole bunch. That being said, I am sure it was more than 100 lbs so I appreciate the extra.
Best dry live rock for the money By Wade on 4/20/2017Wade would recommend this product to a friendThe pieces of rock I received were much larger than anything I have gotten for this price before!
Exactly as promised. By Michael on 3/30/2017Michael would recommend this product to a friendGreat rock, great price. Cured it while cycling my tank and haven't had a single problem. Very pleased.
Really Disappointed By Saltlife15 on 2/16/2017Saltlife15 wouldn't recommend this product to a friendI received the live rock today and I'm very disappointed. I'm setting up a Biocube 32 and this box came with 5 massive rocks. I was really expecting different size rocks. I gave it 2 stars because the packaging was good and the rock looks pretty clean.
Great packaging and delivery By jeffrey on 1/16/2017jeffrey would recommend this product to a friendI ordered 100lbs for a new 100 gallon I am upgrading to from a 50 gallon I have had for a while. I am currently starting the curing process using muradic acid. After research I feel this will be the best way to get off the dead stuff. The product was well packed and some holes in the boxes, but it is 50lbs coming from MN to the west coast. ;-) I received it in the 3 business days as well.
A good selection of rocks By Erik on 9/27/2016Erik would recommend this product to a friendI ordered 100 pounds of this rock to add to my already existing 400 gallon system. I had some nice large pieces and only 1 "rubble" size piece. The reason I am giving this 4 stars is there is a lot of dead sea creatures on this rock, I pressure washed the rock to knock off as many dead creatures as possible and pulled out some surprising large sponges.
I put all the rock in a container with saltwater and about another 20 pounds of live rock from my sump turned on the pump.
I hope that it will be for ready to add to the display tank in about a month.
Great product, nice size By Zach on 8/18/2016Zach wouldn't recommend this product to a friendThis rock was better than I expected. I know a lot of dry live rock is just picked over smaller pieces, this was not the case for this rock. This rock was all very large in size with some small pieces also. Great product highly suggest to everyone!
great value and product By Patricia on 6/27/2016Patricia would recommend this product to a friendthis rock is fantastic, very very happy with it. its beautiful ! and i am very impressed w the packaging by BRS , cause UPS or whoever delivered it busted the whole big box ,all bashed and mashed w the bottom of the box almost totally opened. i expected to find alot more rubble rock but there was 2 , count it, two small pieces of rubble rock!! awesome PACKING job BRS!!! its curing in a brute right now! :)
Super Amazing Rock By Boxy Guy on 6/25/2016Boxy Guy would recommend this product to a friendThis rock is amazing. I just got it yesterday and there were huge pieces and large pieces and medium pieces. Great shapes too. I have a quick youtube video showing all of the amazing pieces I got at https://www.youtube.com/watch?v=JaGHDB69Tro
I was very impressed with the quality of the rocks and the care with which they were packed and shipped. Will only by BRS Dry Fiji Rock from now on. Tripple Thumbs Up!!!
Great Rock-Like everything be paitent By Todd on 6/25/2016Todd would recommend this product to a friendI bought 2 50 pound boxes for my 120 Gallon Reef tank. I was expecting small and medium pieces, but I got a really nice assortment of sizes. Everything from huge to around softball size, no rubble. The rock arrived in great shape, and far exceeded my expectations. The 100 pounds that I got would have probably been 150+ pounds had it been live rock, but with the cheaper price, not paying for the water soaked into the rock, and the fact that you get no bad hitchhikers this is absolutely the way to go.
Like BRS shows in their BRS TV Videos, you need to cure this rock. It was taken out of the ocean and the things living in it died. So when you get it make sure you cure it in saltwater with a pump and heater. That will allow all of the dead organic material break down into ammonia and phosphate. Then move it to your display tank, and you have some amazing live rock for less than 1/2 the price.
Semi-dead rock; 3.5 stars By Philip on 6/17/2016Philip would recommend this product to a friendThe dead rock is not completely dead and will have very strong dead ocean smell. You will need to cure by removing decaying material. I chose to cure rocks and cycle new tank together; regret because dead rock came with tons of ammonia, for 3.5 months ammonia, nitrite and nitrate were all too high to measure. Once ammonia & nitrite hit zero, nitrate was beyond sky high. On plus side feel it came with good selection of small and large pieces. Cure this rock well!
Good for the price By Tom on 5/3/2016Tom would recommend this product to a friendIt's mainly large chunks if you're looking for small or medium pieces this might not be the best choice