limestone

I have a couple weeks before my 50g and stand arrives so I am soaking wood and preparing some Seiryu rock for aquascape. There are a lot of images of acid washed Seiryu rock that are attractive. The acid appears to darken the stone and increase the contrast with the white veins, my guess is by...

Hi all, I have an Eclipse 12 set up with a Flourite base, and some gravel and sand mixed in. There's a big piece of Mopani wood which is no longer leaching tannins, and two porous rocks. They were advertised as Tufa rock and Lava rock. For flora/fauna, I have some wisteria, some java ferns...