i have a question on fuses between batteries

[homiewes]

hey guys to start it off i have a rockford t4000.bd amp and i have a second battery, i was wondering do i run ground from the stock batt to the second batt in back or can i just have the second battery grounded in the back, and also what size fuses should i used between the 2 batteries, and also from the 2nd batt to the amp, should i use all 300amp fuses or should i go smaller?

[fr34kout]

Grounding second battery - Ground it to frame or chassis. Keep the run as short as possible.

Fuses between batteries - Fuse to the size of the wire, 300a for good 1/0.

Fuses to amp - Match it to the fuses on the amp.

[C-Fizzy]

I hope you have more than just a second battery for a t4000

[homiewes]

I hope you have more than just a second battery for a t4000

ok thanks guys. and yeah i have a 220 amp alternator.

[TeamHT]

i took out one t4 and am running two t4s with dual 300amp iraggi alts and 4 xs power d3100s with a yellow top under the hood. sme say overkill but...who knows, lol