I've started graphing my Aquarium's health. Yesterday it had reached 30%, and today it's reached 32.16 percent.

I'm also graphing my fish's happiness
Yesterday, my fish's happiness numbers were as follows:

Printer, the arrow fish: 12,168
Lyle, the streamer fish: 9,136
Whimsy, the sharktooth fish: 10,104
Mewliet, the hermit cat: 5,020
Buttercup, the air fluff: 5,040
Velen, the knight fish: 10,004
Sparta, the seahorse: 12,004
Feferi, the cuttlefish: 1,016
Romeow 2, the hermit cat: 5,020
Fesrai, the cuttlefish: 1000

And today, the numbers had increased quite a bit:
Printer, the arrow fish: 12,176
Lyle, the streamer fish: 9,144
Whimsy, the sharktooth fish: 10,112
Mewliet, the hermit cat: 5,030
Buttercup, the air fluff: 5,050
Velen, the knight fish: 10,006
Sparta, the seahorse: 12,004
Feferi, the cuttlefish: 1,024
Romeow 2, the hermit cat: 5030
Fesrai, the cuttlefish: 1008
Equius, the arrowfish: 12,000