Unless your barrels were "sealed" at the top, the two barrels would eventually level off (assuming they are both the same diameter). The 10' length of 1" pipe isn't helping the situation in terms of time it takes.
That said:
1. What is the size of the SPF cross-over hose?
and
2. Is the SPF tank baffled inside?
That said:
1. What is the size of the SPF cross-over hose?
and
2. Is the SPF tank baffled inside?
