Oh good. The main thing to worry about, much more than PH is Ammonia, Nitrites and Nitrates. Ammonia and high Nitrates will kill fish.
Orange slices are good, I use a clip and only feed just before a PWC. Zucchini is good , you can blanch it or leave it in till it softens a bit. Peas are key though. Keep a bag in the freezer.
Rinse all veg and greens. Buy organic if possible, but still rinse well. Since peas get skinned, just regular is fine.
Don't wait too long to upgrade. As u saw from vid, they grow FAST in good conditions. They need room to grow, don't wait till you realize they aren't growing. Used tanks or $1/gallon sales can help get you a bigger tank. Or look for a local Aquarium Club. Ours has great auctions and I've gotten a ton of great deals and freebies.
Sent from my iPhone using Tapatalk