Can play sand from HD be used as substrate? I was trying to see if it had silicates or not...it didn't say. Is there a particular type of sand from the home improvement stores that can be used successfully? (I am setting up a seahorse tank soon)
On my 75 gallon reef tank, I apparently have crushed coral. I thought at the time it was the same as "special grade" reef sand (which is what I was aiming for). It is probably 4-5" deep (set on a plenum) and has been in the tank for a little over a year. Is it important that I change to something with smaller particles? I am afraid of crashing my tank if I start moving it around much.
My nitrates are typically high in this tank, and lately I have quite a bit of cyno. Could my sand bed be contributing? Would it be best to just leave everything alone? I was hoping the plenum system would keep the nitrates in check, but the particles may be too big to do the job correctly.
I have nass. vibex snails, some bluelegs, cerith snails, a couple of nerite snails, and a lawn mower blenny. Can I just add another cleanup critter to keep it cleaner (without removing pods--I have a mandarin)?