Im setting up a tank with Demasoni and electric yellows and maybe few more later, Tank is 620T so its kinda High so want to but in driftwood. Will it lower PH level.

Yes driftwood will - would try to be more helpful but I don't have those types of fish.

I don't think driftwood will stand a chance against calcite sand. It barely does anything in my tank which is suppose to be low pH and gH.

Are you sure its a good idea to be putting malawi cichlids in a tank with such a small footprint? Especially considering most people here will recommend you get a sizeable mob of dems.

The amount of difference driftwood will make to the pH depends on what else is in the tank with it.

Personally I wouldnt put african cichlids in a tank that size. What sort of population were you looking at having?

Really, damn, I thought it would be big enough but kinda jumped into it and didnt do my homework. Was planning on about 12 Demasoni an 6 or so electric yellows.

I would have thought youd be looking at a 4ft/240L for a group like that. But see what the more experienced people in here say.

i had 32 africans cichlid in my 4ft(but sold them just the other day).