After years of just fish only salt, I'm switching to soft corals in a 70 gallon tank. The tank isn't drilled so a sump will be tough. I would like to continue to use the Fluval 403 that has been flawless for 17 years.
The filter has 3 compartments. I am thinking of taking out two compartments and filling the bottom of the filter with 6 inches of aragonite sand, and then some lava rock and set the last compartment on top of the lava rock. In order to keep the height correct, I may have to modify the compartments rather than remove them, but the point would be to have no flow through the sand, flow around the lava rock and then go through some filter floss and a sponge in one compartment.
Any comments on this idea. It should do better than the standard setup of making nitrates that I have now shouldn't it?
The filter has 3 compartments. I am thinking of taking out two compartments and filling the bottom of the filter with 6 inches of aragonite sand, and then some lava rock and set the last compartment on top of the lava rock. In order to keep the height correct, I may have to modify the compartments rather than remove them, but the point would be to have no flow through the sand, flow around the lava rock and then go through some filter floss and a sponge in one compartment.
Any comments on this idea. It should do better than the standard setup of making nitrates that I have now shouldn't it?