Substrate Switch! (Success)
Well, I finally did it. I switched substrates in a fully functioning and cycled tank. Risky business for sure. I had white National Geographic substrate that just looked nasty with fish feces and plants roots growing through it. It needed to go. So with a few Home Depot buckets and a few hours, I was able to switch everything out. I've lost one Otto catfish so far, probably due to the water temp dropping in the buckets then the new water being added. Also have what looks like zero algae at the moment.
I kept about 30 - 40% of the original water and all the decorations and plants. Also kept the canister filter in tact. Probably change that in a day or two.
So here it is. I definitely like the black substrate more than the white!
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30" Finnex Planted+ 24/7
Fluval 206 Canister