what's the other clam?Here are a couple pics of one of my gigas. If you look hard you can see the growth ring from when I got it in the pic where I am holding it. Best guess I have had it just shy of a year so far. Lighting is 400watt Mh. I am up to 250mils of alk and 250 mils of ca a day. I also started dosing part c with good results so far.