The shot at nl25 didn't go so well. Got knocked back down in a few minutes.

Here is how one gets that kind of ev difference.
PokerStars - $0.25 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4
BTN: $26.29
SB: $30.34
BB: $43.88
Hero (UTG): $25.00
MP: $25.00
CO: $43.63
SB posts SB $0.10, BB posts BB $0.25
Pre Flop: (pot: $0.35) Hero has A♣ A♥
Hero raises to $0.75, fold, CO raises to $2.25, fold, fold, BB calls $2.00, Hero raises to $5.80, fold, BB calls $3.55
Flop: ($13.95, 2 players) 8♥ 4♦ 8♣
BB checks, Hero bets $4.80, BB raises to $21.25, Hero calls $14.40 and is all-in
Turn: ($52.35, 2 players) 3♣
River: ($52.35, 2 players) T♥
Spoiler
BB shows T♠ T♦ (Full House, Tens full of Eights)
(Pre 20%, Flop 8%, Turn 5%)
Hero shows A♣ A♥ (Two Pair, Aces and Eights)
(Pre 80%, Flop 92%, Turn 95%)
BB wins $50.35
So then it was back to nl10 to grind it back. Which went pretty well, I think I'm about 175 now so can have another shot at nl25 with a whole buyin (lols) of wiggle room.

Not too many interesting hands. Perhaps this one.
PokerStars - $0.10 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4
BTN: $13.03
Hero (SB): $19.06
BB: $10.43
UTG: $10.44
MP: $10.36
CO: $10.00
Hero posts SB $0.05, BB posts BB $0.10
Pre Flop: (pot: $0.15) Hero has K♣ K♠
fold, fold, CO raises to $0.30, BTN calls $0.30, Hero raises to $1.30, fold, fold, BTN calls $1.00
Flop: ($3.00, 2 players) 8♦ Q♥ 6♠
Hero bets $2.05, BTN calls $2.05
Turn: ($7.10, 2 players) 7♦
Hero bets $15.71 and is all-in, BTN calls $9.68 and is all-in
River: ($26.46, 2 players) J♦
Spoiler
Hero shows K♣ K♠ (One Pair, Kings)
(Pre 92%, Flop 91%, Turn 95%)
BTN shows Q♣ K♥ (One Pair, Queens)
(Pre 8%, Flop 9%, Turn 5%)
Hero wins $25.27
I suppose against someone a little more decent it's probably a good idea to size the flop cbet so the hand lasts 3 streets. But here against a weaker player, the theory goes, 'shovel as much money into the hand as possible, before he gets scared'. I think his calling range on the flop is fairly inelastic to betsizes. With that betsize he'll likely continue with any piece of it. Then on the turn, a small overbet, board is still fairly dry but looks like draws are possible. Kind of the optimal board for fish to hero call, coz they like to do the same kind of large polarized bets with draws.