[Plinkploop]

Since you're using aquasoil you're going to want to change 50% everyday for the first week, every other day the second week, twice a week the third week and once a week thereafter (or monitor and adjust water changes based on accumulated nutrients in the tank).

Monitor your parameters and when you've bottomed out on nitrate that's when I normally start dosing frets, until then there's just too much of a risk (in my mind) of making the starter algae bloom worse.

Bb should be added per instructions. I have not used fritz' so I don't know how to advise you in that.

I usually use a turkey baster to remove air bubbles in substrate. Hope this helps.

 

[Plinkploop]

I lightly squirt around where the bubble is, usually I can get the substrate to shift and fill in. I've also been successful in sucking out the bubble through the carpet and then I poke down a little to fill with substrate. Glad I could help 😁👍

 

[Plinkploop]

Safest way is to cycle fishless, especially with active substrate. I'm sure you can do it with fish as well but if you're getting ammonia from the substrate anyway you might as well just fishless and not risk losing any livestock. This is just my own opinion. Just do your research and figure out which method of cycling is right for you. GL!