4 Orandas On 30g Tank., Water quality - 3days old New Tank Options

[orandaslover06]

I currently have 4 orandas on 30G tank, they are about 1" in size excluding tail. I'm new to caring for goldfish since I've always had Betta's (still do actually). I've spent great time on this forum since its very informative and very helpful to new goldfish owners like me. But of course, as a new concious new owner I had a much more specific question:D I know that Oranda's are know are fancy fish and are also know to be very very missy. My concern is, I've monitored my tank which is 3 days old, by doing water check every other day, as I've read on this forum. My Ph 7.6 seems consistent, Ammonia 0.50ppm which has also stayed conistent, but my [b]Nitrite had spike up today, it was 0.25ppm the day before but today its 0.50ppm[/b[b]], Nitrate however stayed 0ppm. Is it time for water change? 50% or less. Or is this because my filter has not yet develop BB,and since my water hasnt cycle yet. I know it take 2-4 weeks for a tank to be cycled. But I dont want my fish to die either due to toxic level. I appriciate all the responses.