What public sources confirm
The official Roblox page and current July 2026 competitor guides agree on the core loop: catch fish, place them in your aquarium for cash, then use that cash on rods and other progression.
Treat the aquarium as the first economy checkpoint. If a fish is sitting in inventory instead of earning passive cash, the next rod or capacity upgrade usually arrives slower.
The safest upgrade order is simple: redeem current codes, place catches into the aquarium, spend OFFICIAL cash on the next clear rod or aquarium unlock, then judge whether rerolls, wheel spins, or time skips solve your next real bottleneck.
AURA MAXXING and the later Delulu Upd both changed the surrounding reward surface. That means daily rewards, BAIT Auras, and patch bonuses matter, but exact payout tables should stay in-game until a public official table exists.