DiscusHeckel
Acropora Gardener
The tips, which consistently grow like this when I dose Spongepower.
This is mentioned on KZ sponge power bottles. So, the product does what it says it should.
I get the same colourful thick growth tips on my staghorns with sponge power. However, I dose almost double of what you dose (i.e. 3 drops for 65 (US) gallons). Some in the KZ forum reported increase in aiptasia population. I have not noticed it in my tank.
Cheers