The Puffer Forum

Hey Puff Family,

I have a well established 75G freshwater tank with regular aquarium gravel substrate. I recently received two 1" Ceylon Puffers that are happy and eating. I will begin the change over to brackish and full marine as they grow and over time. As a first step, yesterday I bought 60lbs of argonite sand. My question is:

Can I remove the old substrate and add the sand to the tank now?

Or should I add the sand in increments because adding it all at once it will throw of the pH?

I just don't want to cause a spike of some sort and stress the fish.

Please help and thank you!

Was wondering the same thing, my Ceylon started in fresh, now in brackish, going to full salt. There's flourite and gravel in there and I don't know when to take it out to put in crushed coral

Forget CC, it traps too much detritus in there. Better to use aragonite sand for BW or play sand for SW. If the tank is well-established, I wouldn't worry much about changing out the whole thing.

Oh. I have two buckets full of it... wish I could trade it for sand

Do this right or you're going to have problems. Look up issues with CC.