My one suggestion would be to get a couple chunks of real wood, like Malaysian Driftwood which is very dark brown, usually full of crevices and tunnels, and corys really like this. It also releases natural organics into the tank which will help the fish, and the fry when that time comes.
On the Leaf Zone, I wouldn't. This product contains iron and potassium, but none of the other 15 nutrients. It may be sufficient in some cases, again depending upon your tap water and fish foods. But I prefer using a complete fertilizer. My present one is Seachem's Flourish comprehensive Supplement for the Planted Aquarium. Make sure it is this one, as they make several different products under the "Flourish" name. A very small bottle will last you months, you use very little; 1/4 teaspoon in a 10g once a week is all I use. Another similar product is Brightwell Aquatics' FlorinMulti.
Byron.
On the Leaf Zone, I wouldn't. This product contains iron and potassium, but none of the other 15 nutrients. It may be sufficient in some cases, again depending upon your tap water and fish foods. But I prefer using a complete fertilizer. My present one is Seachem's Flourish comprehensive Supplement for the Planted Aquarium. Make sure it is this one, as they make several different products under the "Flourish" name. A very small bottle will last you months, you use very little; 1/4 teaspoon in a 10g once a week is all I use. Another similar product is Brightwell Aquatics' FlorinMulti.
Byron.