sengkang? y not go pasir ris fish farms?
there is a str8 bus there to pasir ris...just pray hard u dun get chased by dogs when u walk in like me when im gg there myself, i take a bus or share a cab with friends or get some1 to tompang u there .... y not buy bit by bit and pasir ris LR has the best variety IMO. a few farms to choose from and price wise..... ur pocket wont kena burnt too much ... depending on ur luck... u can get super encrusted coralline algae rocks or rocks that looks like it was picked up in the gardern
gd luck