Grassies are definitely the best bait for Catfish and that's also why so many 20kg+ fish are being caught in the Vaal. They are so fat they'd probably only weigh 14-15kg in Bloemhof
A friend of mine has a place on the Vaaldam near Frankfort, he showed me some pics of 4 barble he's caught there on his last 3 trips and claimed they were all over 30kg.
I questioned his scale and he immediately produced weigh slips from the butcher in Frankfort. He sacked them in wet carp sacks, took them to town on an unhooking mat and had them weighed along with a printout from the scale.
The fish are not long enough to be 30kg if they were a Bloemhof or river Cat but are so fat and well fed they easily reach the weight of 28, 30.5 and 31.2kg.
I'm going to see if we can get out to fish this section. It is a long flat dam section with a sudden drop to 14m and this is where they get the big Cats
Going to use Trophy's static Wells rig there. Going to rig a 1kg+ Grass Carp on that rig at around 6-8m deep water