Marine Depot offers FREE economy shipping for most products when you spend $39 or more! Your order will be delivered in up to 7 business days after it ships out. Economy shipping methods include UPS Ground, USPS First Class, and/or SurePost. You can also upgrade your shipping to Faster Shipping which speeds delivery to 1-5 days. Orders placed before 10:30 am PST Monday-Friday are shipped the same day. Free shipping is only available within the contiguous United States. Frozen foods, live foods, and items shipped directly from the manufacturer do not qualify for this special offer.
Free Upgraded Shipping For Orders $250+
Most orders over $250 qualify for FREE upgraded shipping! Your order will be delivered 1-5 days after it ships out. Thanks to Marine Depot's two strategically located warehouses in Nevada and Georgia, over 90% of shoppers receive their orders within 1-2 business using this level of service. Orders placed before 10:30 am PST Monday-Friday are shipped the same day. Free shipping is only available within the contiguous United States. Frozen foods, live foods, oversize/overweight and items shipped directly from the manufacturer do not qualify for this special offer.
$5.99 Flat Rate Shipping For Orders Under $39
Most orders under $39 ship for only $5.99 using a mix of economy shipping methods including UPS Ground, USPS First Class, and/or SurePost. Your order will be delivered in up to 7 business days after it ships out. Orders placed before 10:30 am PST Monday-Friday are shipped the same day. Our $5.99 flat rate shipping is only available within the contiguous United States. Frozen foods, live foods, and items shipped directly from the manufacturer do not qualify for $5.99 flat rate shipping.
Frozen foods are delivered 1-3 business days from the day your order ships. Frozen foods are shipped every Monday and Tuesday. Shipping cut-off is Tuesday at 10 am PST (1 pm EST). Orders received after 10 am PST on Tuesday will be shipped the following week. Shipping and handling is a $19.99 flat-rate charge so you can order as much or as little as you like.
Orders not shipped within the contiguous United States—the 48 U.S. states on the North American continent south of Canada plus the District of Columbia—are considered international orders. International orders are not eligible for Marine Depot’s free shipping promotions and additional surcharges may apply. It is important to note that not all products we carry can be shipped internationally. Any brokerage fees, tariffs and/or taxes will be billed to you directly by the shipping courier. International customers must use the same billing and shipping address.
Geo-Marine: Florida Crushed Coral It’s the only crushed coral with aragonite, which provides up to 25 times the buffering power of other crushed corals, dolomite or oyster shell. Eliminate chronic pH problems and provide maximum surface area for water purifying bacteria. CaribSea’s Florida Crushed Coral with aragonite allows an increase in bioload by up to 50% and it never needs replacement! Approx 2-5mm diameter (1/8–1/4").
This product is also able to be utilized in calcium reactors and plenum systems to deliver not only calcium, but also carbonate buffer, and essential trace elements such as strontium (up to 10,000 ppm!).
CaribSea Aragonite buffers to the highest pH and delivers more calcium, carbonate, and trace elements than any other substrate. Little or no rinsing required, aragonite keeps aquariums healthier, longer.
Use our CaribSea-powered calculator to find out exactly how much sand you need.
Manufacturer Info
At CaribSea we take aquariums seriously. Since 1972 we have supplied hundreds of public aquariums, zoos, aquaculture facilities, public and private institutions, and hundreds of thousands of dedicated aquarists with the highest quality marine and freshwater products. CaribSea has been in the forefront of the principle that substrates are a piece of equirment, not just a decorative afterthought. Caribsea substrates are as precisely engineered as any piece of advanced equipment used by today`s hobbyists and professionals. CaribSea products are the chemical support, biological filtration, and biodiversity backbone for many of the most spectacular aquatic displays ever created. We are now celebrating our 35th year in the business, and our product line has continued to grow; making CaribSea your aragonite source and so much more.
Ask a Question Earn 15 Points when you answer a question
Sort By :
9 Questions
Displaying questions 1-9
Q
CRUSHED CORAL FROM CARIBSEA
WHAT KIND OF PH CAN I GET OUT OF THIS PRODUCT FOR MY AFRICAN CIHLID TANK.....
Asked : May 28, 2017
By : DANIEL VENDITTI, HENDERSON NEVADA
Yes it can maintain 7.8 but it will start to dissolve so you need to add more every now and then
Answered : Dec 12, 2019
By : Joe
A
The pH of your aquarium depends on many different factors like carbonate hardness, photsynthesis, co2 levels, ammonia level, organic waste levels, oxygen exchange, flow, time of day, time of year, etc. This crushed coral substrate can help maintain a high pH by increasing the KH. Monitor your aquarium water parameters often, and correct any problems right away to prevent pH drops. If you still need to boost the buffering capacity your water, I recommend the Kent Marine A F Cichlid Buffer, which can even be used to maintain a pH high enough for Victorian cichlids.
I bought this to fill my Calcium Reactor and guess what? it works fantastic!! I especially love the size and the right amount of spaces so that it doesn't clog up or have any issues, virtually low maintenance.! I would recommend this to anyone whether substrate, sump, media reactor...it does a ...Read More
I bought this to fill my Calcium Reactor and guess what? it works fantastic!! I especially love the size and the right amount of spaces so that it doesn't clog up or have any issues, virtually low maintenance.! I would recommend this to anyone whether substrate, sump, media reactor...it does a fantastic job! Hide
I purchased 55 pounds of the Florida Crushed Coral for my 40 gallon Cichlid tank. It was kinda a haste at first cause it took me 2 1/2 hours to wash all the silt and dust out of all 55 pounds. Once I got this in my tank it was still a little cloudy but cleared up in about a day. Other than the amoun...Read More
I purchased 55 pounds of the Florida Crushed Coral for my 40 gallon Cichlid tank. It was kinda a haste at first cause it took me 2 1/2 hours to wash all the silt and dust out of all 55 pounds. Once I got this in my tank it was still a little cloudy but cleared up in about a day. Other than the amount of time it took to clean it I love to look it gives my tank and makes my Cichlids colors pop. And my PH is alot higher more stable because of it!!Hide
The ad says 2-5 mm diameter but it's very hard to find any 5 mm diameter pieces, it's mostly fine gravel. Not what I expected
Shipping and customer service was great though
upon reading all the different information on the web concerning cichlids, this product "CaribSea Florida Crushed Coralas" was recommended the most to provide good substance. as far as i can tell my cichlids are behaving very well and peaceful. so i'm very pleased. thank you
Most orders under $39 ship for only $5.99 using a mix of economy shipping methods including UPS Ground, USPS First Class, and/or SurePost. Your order will be delivered in up to 7 business days after it ships out.
free shipping for orders $39+
We ship 99% of the products we carry for free within the contiguous United States using a mix of economy methods including USPS First Class Mail, SurePost and UPS Ground. Your order will arrive in up to 7 business days. Just spend $39 or more!
free faster shipping for orders $250+
Over 90% of shoppers receive their orders within 1-2 business days. Upgrade from free economy shipping to faster shipping for only $5.99—or spend $250 and we'll upgrade you automatically!
need your order even faster? no problem!
Expedited shipping services are available for most products if you are in a hurry. Get guaranteed delivery in 2 business days, 1 business day, or next day by 10:30 am. Costs vary by location.
buy it today and we'll ship it today
Same-day shipping is available Monday-Friday for most products—place your order by 10:30 am PST. Pre-ordered and back-ordered items do not qualify, nor do drop-shipped, live, or frozen shipments.
live plants, live foods, and frozen foods delivered to your door
We ship live plants, live foods, and frozen foods within the contiguous United States. Each of these categories is subject to its own $19.99 flat-rate shipping fee to cover the special packaging and/or expedited shipping costs required to ensure safe delivery. Orders with 12+ live plants ship free!
Return any new and unused item within 60 days for a full refund. Having difficulty with a product? Contact us to speak with an aquarium expert. If you need a replacement, fill out this form.
A small segment of the 180+ brands we carry require that customers contact them directly if/when problems arise. You can view the full list of those brands and get their contact info here.
We are unable to accept returns of Digital Aquatics, Neptune Systems, Vertex Aquaristik, Aqua Illumination (AI), EcoTech Marine, GHL, or Seneye products once the manufacturer's packaging seals have been broken.
Marine Depot is an authorized reseller for every product we carry. That means when you buy aquarium supplies from us, your products are not only backed by our own 60-day return policy, they also carry full factory warranties, where applicable. Some items have a 1-year warranty, others have limited lifetime warranties. Warranty coverage varies from manufacturer to manufacturer, so please read the product description of the item(s) you are considering thoroughly for details or contact us if you have warranty questions.
Rack up reward points to earn discounts on future purchases! You can earn reward points by creating an account, writing reviews, referring friends, subscribing to our newsletter, buying products, and more!
Earn 5 reward points for every $1 you spend to get 5% cash back Most Products
Earn 1 reward point for every $1 you spend to get 1% cash back Abyzz, American Marine, AquaIllumination, AutoAqua, CoralVue, Digital Aquatics, EcoTech Marine, Giesemann, GHL, Hanna Instruments, Hydor, IceCap, Innovative Marine, Iwaki, Kamoer, Kessil, Klir, Korallen-Zucht, Maxspect, Mur-lok, Nano Box, Neptune Systems, NYOS, Oceanbox Designs, Pax Bellum, Radium, Red Sea, Reef Glass, Reef Octopus, Seneye, Somatic, Tunze, Vertex Aquaristik, and Waterbox Aquariums
You can also get bonus reward points by purchasing select items during special sales and promotions.
If you find a product we sell for a lower price at another online store, we will match their price to ensure you always pay the lowest amount when you shop with us.
Enter the price, shipping cost and website address where you found the lower price. Then click the "Add to Cart" button. We will review the lower price while processing your order and make any necessary reductions before your order ships. Some restrictions apply. See Terms & Conditions
See 1 More Answer 
