Tomorrow, since it's dark.
Ours is a 40 gallon tub out front with duckweed and water hyacinth. My daughter's goldfish is out for the summer and loving it. We're trying really hard to groom him so he'll fill out properly. He's supposed to be a ryukin, but got kind of starved before he came here so was really far behind growth-wise.
She said she wants a steampunk aquarium, so I picked up a leaky old 40 gallon from goodwill for $10 and am in the process of converting it. The new silicone should be cured tomorrow afternoon.
Here's the little guy when we first brought him home:
A month later, much better. Hopefully it's not too late for him to reach his full potential.