Aquatop,sunsun,polar, and another are all the same filter.
I'm 90 percent sure its the o ring as the top of the canister was holding water and thats a no go. But its release valve was also leaking so a 2 fold issue i may try to fix.
I like the fx6s but its flow concerns me in a planted tank.
Eheims are so pricey, but may have to go that route.
I can seem to find a spray bar for the fx 6 only the smaller models and if I were going to buy two 407s I may as well spend the money on the eheim...ughh first canister I've had die.
How expensive/hard are sumps ?
15 gallons in the floor is not something I wanna do again