VaughnH;29279 said:I found some similar looking rocks at a landscape supply place too. But, when I dripped some acid on them I found what I suspected - the rocks are carbonate rocks, which is how they came to have the nice lacy hole structure. They aren't good for an aquarium unless you don't mind having the KH slowly rise all the time.
It is hard to avoid algae on start up when you have a very lightly planted tank. And, it is likely to be harder with a lightly planted tank in Aquasoil, because there is even more ammonia being generated in the tank. It would work better if you did the water changes every other day for a couple of weeks, then began to stretch the time between changes until you got to the weekly changes. But, with so few plants it is still hard to completely avoid algae.
You didn't mention how long you keep the lights on, but for a new tank it should be less than 8 hours a day, and some people believe that you should start with just 4 hours or so for a few weeks.