Have added a 7” Maxima to my 240. Clam is doing well. Attached to rock and growing new scutes. Been in the tank about 3 months and just recently I noticed a my Alk has dropped about 1 dKh and my PO4 has gone from a steady .06 to just about 0. Could a clam have that significant impact on those parameters in such a large amount of water. Also, Alk and Ca I can understand (although my Ca hasn’t been impacted) but PO4? And what about NO3? Thanks.