So, I did remove the top layer of sand plus a little more about 10 days ago and continued with my dosing regiment along with cleaning the glass every few days. This equated to about 1/4 of my shallow sand bed. Sand looked clean for a few days and then started turning that reddish brown color. I left it alone and today I took sand samples from 5 locations where than sand was reddish brown and low and behold I could not find one Dino under the scope but found a butt load of Diatoms which is what I was trying to bloom. I put the sand I removed in a large bin and added vinegar and bleach and covered the bin for 5 days then rinsed the sand numerous times until there was no more detectable chlorine. I laid the sand out to let it dry completely. Sand is nice and white.I have LCA and I am dosing silicates, bacteria and phyto. I have read just about every thread/post on LCA and am confused about tank cleaning. If dosing silicates to attempt to create a diatom bloom is it recommended to clean/remove or not to clean/remove the top layer of sand? Also since dosing silicates I am getting a brown film on the glass. Should I clean or not clean the glass? Prior to starting the treatment I did remove the top layer of sand, and sand looked good for a few days until the LCA returned in the exact same locations. Also I have shut down my UV since I began treatment since LCA is not waterborne.
Recommendations would be appreciated on the cleaning aspect.
Thank you!!
Questions are, what is my next step? Should I stop adding silicates and vacuum the sand or leave the sand alone and let the diatoms disappear on their own?
Also, when and how should I add the clean sand back into the tank? Should I seed the sand or just lightly mix it up with the sand in the tank once the Diatoms are gone?
One bad thing that has happened when I got Dino's and stopped dosing carbon and started the treatment is that my nutrients have gone up significantly. NO3 went from 10.5 to 18.4ppm and PO4 went from .05 to .18ppm as of today when I got Dino's and stopped carbon dosing.
Recommendations on where to go from here would be appreciated.