I have high Silica, please advise.

[MonopolyBag]

I have a nice little 34g nano Solana, established for over a year, recently (last three months) I have had diatoms on the sand, unsightly. I tested silica and it reads low (possibly due to it being used up quickly) I use RO/DI water and Coralife Salt. I have strong Coraline Algae growth and some Colurpa growth as well. A have a power compact lamp and limited corals, frogspawn, zoos, open brain, mushrooms. No other algae problems.

I just added some Phosorb from Seachem (resin phosphate and silica removal) Hopefully this helps.

My question is, my water tests fine before I add it to the tank. I am leaning in the direction that I have low critter count in the tank. Basically, like I do not have the other critters that use silica in the tank (the bugs.) Is there any good products out there with live coppopods and other critters that I can add, possibly on a regular basis, that will aid to the regular population of critters in the tank?

Reason I think this is that I was reading that sometimes in established tanks there can be a lack to critters that compete for the silica in the tank.

My fish include two ocellaris clowns, fish fish goby, yashia goby, and a threadfin cardinal fish. Nothing that I think eats the critters too much.

[AZDesertRat]

What is the TDS of the RO/DI water you are using? How old is the DI resin? Resin begins to release weakly ionized substances like phosphates and silicates even before it is exhausted so never let your RO/DI TDS get above 1 before changing cartridges.
Spectrapures SilicaBuster DI resin is designed specifically to remove things like silicates in the treated water.

One good option to remove silica or silicates from the tank is Granular Ferric Oxide in a media reactor, something like Phosban or one of the similar products, silicates and sphosphates are similar chemically and are both removes by the iron media.