well if you decide to go with 100% LR
, then I recommend 1.5 Lbs per Gallon. After that is where personal taste comes into play. Depending on the porosity of the rock you chose, you may feel it doesn't take up enough space as you wanted, or it takes up almost too much space. If you plan on a sump, you can always throw any excess in there. 2 lbs per gal
is recommended by many, but in my opinon, it can be too crowded if a porous rock is chosen.
Start with 1.5 and see where that gets you. If you plan on using base rock too, as was your original plan, then you still want to end up with a total weight of 1.5 to 2 lbs after mixing with some LR
to seed it. The ratio of LR
to DR is completely up to you and just depends on budget and patience.