What Sand Do I Use ?
I started my first marine tank about 2 years ago. After some research i bought some very fine sand and used that as my substrate. I think its called oolite or sugar sized in some shops. Anyway it was extremely cloudy when i first put it in but after a while it settled down and looked great. Only problem was that when i bought a few power heads it started getting blown around quite a bit. And then when i added coral the sand was getting blown onto the coral. So to fix the problem i bought some crushed coral which is maybe 3-8 mm in size. Its called Florida crushed coral. I put a small layer of that on top. Problem solved ! No more sand being blown about on my coral. Problem is after a while i am finding that the crushed coral attracts a lot of algae growth. I have started to siphon out the crushed coral to leave the original sand bed which is underneath. Looks great again but now i am getting sand blown around. Just wondering if someone can help me know the best sand size / brand i can buy to put small layer on top of the fine sand. I am thinking 2mm might be about right but haven't seen anything that size. I have seen seen sand 0.5 - 1.5 mm. Is that the best option? I have also seen 1.25-1.95mm. I would prefer not to make another mistake.