hydroseeding question...

[tico2007br]

hi guys i am here again lol...i need your guys help.
i dont know if i am doing good or not...
i have a 500 gallons hydroseed i want to know how much i need to do one tank,like:grass seed,fertilizer,hydromulch...
here is what i am doing:
for every tank i use 50 lbs grass seed,1/2 bag of fertilizer(25 lbs starter),
3 bags of hydromulch. i need any more material?
i am asking because the grass is not geting good in some parts,maybe i need more material....
thanks

[tnwildcat]

Looks like plenty of material. I used a 1000 gallon setup and used 75lbs fescue 25 rye and 50lbs fert. Regular mulch 7 bales heavy erosion mulch 5. You maybe spreading material to thin. 1000 gal 1/4 acre so 500 should be 1/8th.