Wonder Shell

Best Seller
Best Seller

These shells are great for adding hardness into your water and work as dechlorinator as well! Often times we need more minerals for our snails, shrimp, plants, goldfish and african cichlids tanks. What size you need depends on your aquarium. We recommend testing your water and adjusting based on water change schedule. 

Here are some very loose guidelines:
3 Pak - 1 shell per month for 5 to 10 gallon aquariums.

2/5 Ounce - 1 shell per month for 20-30 gallon aquariums.

1 1/3 Ounce - 1 shell per month for 40 to 55 gallon aquariums.

2 1/4 Ounce - 1 shell per month for 75 and larger aquariums.

Customer Reviews

Based on 39 reviews
effective and good product

well my water was never that cloudy, but always look like that light spring morning fog lol maybe its the damn fish food lol i have goldfish. and i feed them koi/goldfish food meant for ponds because its cheap 10LBs for $18 but thats a story for another day, but this thing clear it up pretty well....but than i mainly got this not really to clear water i got it for my snails so...yea so far so good. i got a biggest one and i got a 75 gallon.

I can see clearly now! (The haze has gone)

I got the mini-pack of wondershells as an experiment to see how my trumpet snail population would react. Added one to each of my tanks (3 shells, 3 tanks) and to my surprise my water became crystal clear! I didn't even realize it wasn't before!! All of my snails love it as well! I will have one in my all my tanks from now on.

Great Product

I have read reviews for these and finally was able to get some at Aquarium Coop. I use them in the 20G that has snails (Mystery, Nerite and Rabbit...some ponds too) for a good source of calcium. Works well and there is always a snail on one. I will be gettting more in the next order with Aquarium Coop.

What the shell are you waiting for?

We are new to the hobby. We bought one of these shells thinking it would help our lethargic mystery snail. He had barely moved for days. Once he got a whiff of this shell he was all over it. This would be a good item for an auto-ship program. The price here is great as well. I put more in my cart for our next order.

2/5(large) Wondershell

They do make a differance in my aquarium. I use them to aid in keeping the water hardness more stable,also clears up the water i use 2 of these each month in a 75 gallon tank. I highly reccomend these shells been using them for years