SunGrow Shrimp Rocks, Calcium, Magnesium Rocks for Crayfish, Hermit Crab, Snails, Crustacean Care, Aquarium Decor for Crystal Red, Amano and Ghost Shrimps, Nano Tank Accessories, Fish Tank Supplies

Perfect for shrimp and snails! Small rocks, big benefit — calcium for molting, magnesium for color. My shrimp are more active and vibrant within days, snails shells improving too. Easy to use, lasts months. Great for nano tanks

I recently added more shrimp to my aquarium and was looking for products to help aid with their health so when I came across these rocks I decided to try them out. I was initially surprised by how small they were til I realized I ordered the smallest size (duh), so I plan to order the larger size of rocks in the future. I followed the directions and soaked the rocks til they stopped fizzing then added then to my aquarium. So far the new shrimp I acquired (cherry and blue velvet shrimp) seem to be active and look healthy. But the biggest difference I've noticed was with my lone amano shrimp, he seemed to always hide, wasn't very active and never seemed to grow to the size of most amano shrimp despite being a year old. A month after adding these rocks to the tank, I was shocked to see him not only actively swimming about the tank but was also much larger in size and looking healthier than before adding the rocks. So far I feel these rocks are definitely worth adding to your aquarium if you own shrimp, and they also seem to compliment the natural look of my tank.

Shrimp seem happy and are breeding rapidly now

These are not quite as advertised. First off, I got 3 rocks, lol, and they're much larger than expected. The description says “Every pack contains a few pieces of rocks (0.5 inch on an average) surrounded by the rock powder. One pack is enough for a 14 gallon tank and lasts 3 months.” Based on this, I was expecting a handful of small gravel type stones. I have a 2.5gal microtank and I chose these for their smaller size as I was concerned about a mineral overdose with the larger stones especially since my water is slightly hard. (Harder water can cause them to break down faster.) The 3 rocks I received are much larger than .5in but still fairly small and each one is slightly larger than the last. I added the smallest one to my tank as directed soaking it first in a separate bowl. There was no “rock powder” in the pkg and there was no visible fizzing during the soak, just a faint fizzing sound. I did the vinegar test before adding it to my tank and was happy to find that there was no reaction, so these are non acidic and safe for shrimp. To be clear, shrimp do not feed on these. The rocks slowly release beneficial minerals into the water column over time and I'm not sure how effective these are. Again, I only added one small stone. My shrimp don't seem to notice or mind it, and it hasn't affected my water conditions at all. My tank is fairly new so I monitor water parameters pretty carefully. I'll keep an eye on it for the next few weeks and update my review if I notice any significant changes, good or bad. I have a few neocardinia shrimp, 1 nerite snail, and a small school of ember tetras. The stone has been in there for a few days and so far so good. The stone doesn't seem to be softening, disintegrating, or leeching minerals too much or too quickly. I haven't noticed any behavioral changes in any of my critters and no fatalities. I read all the bad reviews about shrimp deaths and toxic tanks but I can't see how these are to blame unless they were added carelessly or not used as directed. Recommendations: Do not put them directly in the tank without soaking. Do not add all of them at the same time! Check your water conditions before and after adding a stone and monitor them carefully for a week or two so you can address any water issues before they result in fatalities. Overall, I'm happy with these. It looks nice in my tank and hopefully will be beneficial to my shrimps and snail. They shipped quickly and even though I only got 3 small pcs, they are very long lasting so I think the price is fair.

Great for adding calcium and minerals to your tank also seems to have improved water clarity. Great value for the money.

Purchased multiple times to cover all 4 of my tanks . 2 amano shrimps tanks and 2 cherry shrimp tanks and have had successfull molts several times.

It’s honestly still too early for me to tell how effective these are. I added the rocks to my aquarium to provide calcium and magnesium, but I haven’t noticed any obvious changes in my fish, water clarity, or overall tank yet. One thing I have noticed is that they don’t seem to dissolve very quickly, so I’m still waiting to see how much they change over time. They were easy to add to the aquarium and can be used in different types of setups, which is nice. So far, I haven’t had any problems with them, but because I can’t really tell yet how effective they are, it’s hard for me to judge the value for the money. I’ll continue using them and update my review if I notice a difference!

Great product! My shrimp immediately jumped on it pretty much as soon as the rock hit the bottom of the tank.

Considerando la grandezza delle pietre un po' care

Received quickly and in good condition, first time using , as it is my first aquascaping set up , shrimp s and snails have been using the calcium rocks from the start , and are still using now after a couple of weeks, a good amount in the packet, and a good price.

Utile mais si vous avez de gros problèmes de GH (GH<3), ne vous attendez pas à des miracles il faudra reminéraliser votre eau chimiquement, avec un poudre GH ou GH/KH

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So uh... on the US amazon website, sungrow selling these for 10$ a pack of 4 oz, limited at 3 packs per customer. I paid 12$ shipping and come down to 66$ canadian for 12oz of rocks. Yall do the math eh? 23$ for 2oz of rock here on amazon.ca is worth it? Sungrow on amazon.ca here should change the price yo. You scamming people.