I’ve now killed 6 clams over the course of six months. This is like the holy grail for me but I can’t do this to anymore animals unless I can figure what I am doing wrong.
Tank has been up for 10 months and am growing everything under the sun. Acros, zoas, anemones. My parameters are as follow
Salinity. 1.027
Mag 1320
Cal 420
Alk 8.4 - 8.7
Nitrates 10 - 15
Phos .02
I’ve always tried maximas that last usually a week and then they slowly stop responding to anything and then die.
Someone please help.
I really love tridacnids and I am the proud owner of a 2" maxima, 4.5" derasa and a 5" crocea. 6 months new to the hobby, I was browsing through my local fish store and lo and behold they had about a dozen tiny maximas. They were absolutely stunning, almost alien-like to me at the time and I couldn't leave without one. I spoke to the store owner for about 20 minutes, read a bit on my phone, and an hour later I left with what was by far my biggest single purchase to date ($190 CAD). About 2 months later it suddenly died and I was devastated - I mean, I put a lot of research and tech into keeping this thing happy. Months passed, and I was able to pickup a larger crocea from a shutdown and this thing proved itself to be bullet proof despite their reputation. Gaining a little more confidence, a few months later I acquired a derasa. And after both the crocea and derasa had shown substantial growth I finally stepped up again to buy a small 1.5" ultra maxima and they've all been happily living in my tank for over a year now.
Given my success with clams, by no means am I a clam guru but I will regurgitate some information that I've read and some of my understanding that I believe has helped me - anyone please feel free to correct me where I am wrong.
1) There are an abundance of reason to not generalize clam species and their respective care requirements. The source and maturity of a clam has a tremendous impact on how easy it is to keep. For example, some aqua-cultured specimens have very few species of zooxathallae hosted within their tissue which can make them far less adaptable to the captive environment. For this reason I strongly recommend sourcing your first clam from a fellow hobbyist where you can avoid the stress of shipment and the clam has already proven itself capable of captivity. As a shopper, I've easily seen 2 in 5 clams die within the first three months of arriving at my LFS. I'm not sure if this can be attributed to shipping stress, poor care or simply less adaptable stock.
2) No species of clam has been found in depths providing less than 150 PAR (source -
http://www.advancedaquarist.com/2011/3/inverts). That said, I don't believe your clams died of photo starvation within 1 week of arrival unless they were already deprived.
3) Standard 1 hour drip acclimation and an additional 30 minutes for every point of salinity difference. For drip rate, double the volume of water each hour and discard extra as necessary. I've read countless forums where it was concluded that an improper / rushed acclimation caused the death of a ornamental shrimp or snail. Invertebrates are sensitive, clams have a very complex anatomy and I haven't heard an argument yet to suggest otherwise.
4) A healthy clam should be free of parasites, responsive to movement, no gaping, extended mantle and very important - at the very edge of its shell, beneath the mantle, it should have white, pristine new growth. I simply wouldn't by a clam if any of these conditions are not met.
I hope this helps encourage you to try again. Luckily, tridacnids have drawn a lot of attention over the years and there is quite a bit of information on them. I strongly encourage you to read up a bit more and try your luck again with an alternative source.