Ive had it for about 4 months and it been fine till 3 weeks ago, when it got a hole on the middle, most of the clams at my local fish store are like that anyways Sony didn't think much of it. Here is a pic of it at the time
Today, it suddenly got worse.
I don't have any fish or inverts that can harm the clam unless somehow, a type of worm or brittleworm got it the tank, but I dont see how because I dip all my corals and my rock was base rock
I dont know if this could be the reason but calcium in my tank is 350, Its that that much lower than it should be so do you think that can be why
Other than that, I don't know.
I've been feeeding it brine and Mysis everyday and every 3 days I would give it phytoplankton (it was recommended when in bought it so I just followed it)
It is getting enough light and it is in the right amount of flow