hey this was the answer about water conditioner:
Re: water conditioner question
Since Quick Start is a bacteria additive, she doesn't necessarily need to use that. She can but she doesn't need to as it won't help with water conditioning. Instead, it adds bacteria to help keep the nitrifying bacteria population going. She can just use Stress Coat as her water conditioner. If she's going to add the water conditioner directly to the tank, then she doses for the full 2 gallons. If she adds it to the replacement water first, then she doses just for that amount. So if she is doing a 50% change, she'd add enough water conditioner to treat 1 gallon. With Stress Coat, it's a little harder to dose for smaller tanks. I usually just kind of eyeball it since it's hard to overdose Stress Coat.
Also if he ate smashed pellets i am pretty sure he will start eating them soon :)
And if you will do water changes like i wrote you don't need filter.