Clams one large acro and a few very large monti caps in nitrates 20 - 30, 27 last sunday. PO4 is high as well 0.36 this is my oldest and most succesful tank and also has the dirtiest water of them all. I'm in the process of transferring everything to a new tank but did get a shot of the acro that grew from a single stick frag
And the clams. They have been growing well. I had a Derasa that tripled in size in a bit over a year but lost it recently due to a broken hinge.
EDIT I'm not saying my parameters are ideal. Just listing what works for me