why are my leaves spotting?

[folklore4]

Yep, light's a big factor. I had my light too close to the water, spots showed up. Raised it a few inches, problem solved.

[flumon]

Thanks for the advice, everyone. I'll test my GH and KH, and maybe cut back the light a bit. Gonna try the potassium supplement too.

Good plan! Let us know how it goes. Also, if you're dosing ferts, make sure you're not overdoing it. Balance is key.

[scaledone]

Another thing to consider is your filter flow. If it's too strong, it can stress the plants. Anubias prefer slower flow. Maybe adjust your filter output?

[Ryegrain]

True, flow matters. My Anubias was getting beat up by my HOB filter. Switched to a sponge filter, plants are chillin' now.