I bought this at feeders supply on an impulse buy because I want to use it for my 20 gallon long brackish setup for a puffer and gobies but I didn't think about how rocks affect the water. My tap is neutral ph and fairly soft and puffers and gobies need higher ph and hardness so could I use this?
View attachment 20161110_175923.jpg
View attachment 20161110_175923.jpg
