Well sadly still no answer from the owner of the dead giant aimara about how big his new one is. So far we know there are claims of 88lbs aimara and micropeltes of roughly the same weight. Anything proven did not pass the 40lbs barrier and both species seem to be pretty close.
Yet there are two other big species in the channa tree which are rumored to get quite big, channa argus and channa marulius. The info is even more vague there, but considering both are reportet to grow quite a bit longer than both aimara/micrpeltes, they might also be heavier in the end.
In case of marulius, there is a video of fish which reached over 40" in lenght: