6mm is actually enuff for a 2ft sump tank. I have a 2 1/2 ft sump tank... Yazid, hope everything is fine. Did it break thru or leaking by the place U glued??
Yup, that's what my tank is made up of.. 4 inches of river sand plus one inch of grade 1 sand..... The river sand make yr tank look dull anyway. the white 1" sand can brighten things up too.
Thanks... Still looking for a buyer for my lights... Anyway I just acquired an emporer angel for my fish only tank... Kinda of young, hope it will last thru.