junk in my fuel/water separator

[RWilson2526]

So before I had my carbs rebuilt I installed a new Racor fuel/water separator. (boat never had one) I've been out twice with maybe 6/7 hours running time total and already have what I consider to be a decent amount of grit/sandy looking crap in the bottom of the see through bowl (no water though).

I do have a 4 year old gas tank that I picked up over the winter that I was planning on installing but wanted to wait until later in the season or maybe even the fall to minimize my down time (I planned on redoing the fuel tank hatch at the same time as it is getting soft) I'm thinking I shouldnt wait maybe....

The filter should be catching all the crap I would hope....think I should wait or change out the fuel tank?