Shopping online was easy and quick! The support team has always responded to my emailed questions within an hour!

I still need more time to see if the crushed coral will buffer my tank to keep up my PH level. Need to give it about 2 weeks for tge coral ti dissolve.

I bought this to help with the water conditions for my guppies. After washing, I scattered some around in the sand, then put a bunch in a mesh bag and just set in a back corner of my tank. Using the test strips from Aquarium Co-op, it seems to be helping in better readings for hardness and buffering. So far so good and I am really happy with the results. Definitely a good addition.

I have low KH ,ph in my tanks so I add this and it helps greatly. Wish it was sold in bigger bags. I have tried aragonite but don’t get the same results. Thanks guys for a good product and great customer service.

I put 3 lbs of crushed coral in my 3 month old tank that has STS substrate in it, along with some cuttlebone and a small dose of Alkaline buffer (no fish in tank at the time so as not to cause shock) and after 1 week the ph and KH are very stable! Fish went back in and are doing fine!

Ive used a whole bag on my 10 gallon tank which was chronically at 5.5 pH but once I used this it instantly brought my pH up to 7.5 within 24 hours. And after a few water changes and weeks it has been at 6.8-7.0 pH, highly recommend.

I recently moved and my new home has more acidic water than my previous home. I have snails so I am always adding calcium but I wanted to use a slow release source. I understand coral will raise my pH a little so that will be a plus for me. I have mixed it with my substrate before, but then the white looks odd with my gravel, so I’m using a mesh bag to hold it.

Had low ph in several tanks below 6. The guppies were all I’m at the waters surface and I had several ti die. I checked the ph and it was really low. I ordered crushed coral and it arrived very quickly. Time was of the essence. I added it to my filters. Within a hour the ph had started to rise. The guppies were swimming normally again. I have added this to 3 separate tanks and it has worked Everytime.

This was a perfect amount to ad to my aquarium for a gh/kh boost.

Exactly as advertised. Helped raise my buffering capacity. Good size that mixes in with my substrate. As always the nothing but the best quality and shipped fast.

I can always trust Aquarium Coop because they know what they are doing.

My local tap water starts around 7.2 and drops to 6.4 within 24 hours. I decided to add crushed coral in a small mesh bag and have maintained around 7.4 ph for about 2.5 weeks. Today I removed the bag and shifted the coral bits around and put back in the tank..hoping for a longer usage out of my first mesh bag! 🤞

This is good quality crushed coral: no shells or shards of broken shells etc. Just coral.
I added 2 bags(2 lbs) to my 38 gallon tank. Mixed into my gravel. I find it easiest to rinse it in a fish net and then just add it to the tank with the net.

Turning another Mystery Snail tank into an all Daphnia tank..
It will be a combo of empty snail shells and this coral.
It works for me!

Needed Cruched Coral for one particular fish that didn't reprocreate vitamin D . Ever since I've brought the fish with Crushed Coral and his been healthy with the others .

Delivery was impeccable. The crushed coral is dusty but not a huge mess in the box with my other items.

I have a decorative cap in my tank and I mix this with the gravel and sand to add more texture visually to my tank.

I’ve been having issues with my water levels in my tank and this seems to have solved my problem.

This was smaller than I imagined when I received it,(unlike the bio rings), but 1lb nonetheless.

I got this for my two snails, as my water is pretty soft and I was worried about their shells getting enough calcium. After about a week, the one snail who I was most worried about looks to have a strengthened shell and the other one is doing great! Make sure you rinse it out thoroughly, otherwise there is a lot of dust. It comes in a double packaged plastic bag so no worries about breaking open and making a mess, there are some whole shells in there so you know it is truly pure crushed shells/coral.

Brought my Ph up a little, no more expensive Neutral Regulater, just prime .

I needed to add a little something to help buffer my PH some and this worked great and is very low dust!

This was my first order from aquarium co op after years of following their online content. And honestly,? Exactly what I expected. Nothing less. Material quality was perfect. Exactly what I ordered. Quick shipping. Easy transaction. Also, the crushed coral I ordered actually worked as intended. Much more stable harder water using rodi. Again, perfect.

Received fast and on time. Like all orders. Also great quality.

I’m so pleased with my purchase, it got here super fast, and the coral helped me safely bring my aquarium ph up. It was my first time ordering from aquarium co-op, and I couldn’t have asked for an easier experience.

Definitely take the time to rinse it. I was having kh issues. Crushed coral saved the day. I put mine directly in the gravel. The pieces are small enough that it blends in nicely. If I need more calcium, I’ll add it to my box filter. I definitely recommend this (and all) and all products by ACO. 💚

Great product. I was having trouble maintaining a good Gh level with the water I have. Stable now

Not much else to say, thank you Aquarium Co-op!