[Reef w/o Chiller]

If ur ambient temperature is cool, it is possible. Otherwise I have used iced bottles in the ios during my beginning years. Of course the temperature won't be consistent. So not ideal. Just remember that marine keeping is not difficult. It is only about keeping as many parameters as consistent as possible. 

[Aiptasia help]

Concentrated kalk mix can kill aiptasia too. Go Google on it. 

[Best marine fish food]

TDO is good. Different sizes. 

[So sad]

Anemone juice has caused many good tanks to crash. 

[Condensation]

Maybe adjust ur chiller temp a bit higher. Corals are OK with 27.5

[Reefkeeping and Vinyl Flooring]

Check with ur flooring contractor. There are many grades. Some can be used in kitchen wet area. Others I heard, especially EC's  have poorer quality. 

[Bengai cardinal]

Bangaii is easy to wean. Just throw some pellets together with mysis at every feed. Soak the pellets in mysis first. 

[Gonio not extending]

Check if anything is pecking it. 

[Feeding corals?]

Clear plastic tubes can be found in Art Friends. They come in 1-3ft length 

[Nuisance Algae]

Vibrant is definitely the way to go. My tank was infected by bubble algae. Plucking them off didn't help. No matter how careful I was not to pop them. From 5, they multiply to almost 100. Vibrant dosed for 2months and all eradicated. Never appeared ever. I had lps and sps. Never did any harm to any. As long as u follow dosage and be patient, it will do its job nicely

[Disappearing corals that used to be In abundance]

Hardly seen.