substrate change/ammonia spike

Yesterday I changed my substrate in my 75 gallon tank. I removed all my driftwood and rocks and put as much of it as possible in a container with tank water. I also filled 3 five gallon buckets with tank water and put the fish in them. So all substrate and water removed I added the new substrate and started filling back up. I added 2 and 1/2 capfuls of prime which should be enough for 125 gallon tank from the way I understood it(normally I add 2). After this I poured the water from the container with driftwood and rocks back into the tank along with the deco as is was filling. Then the rest of the tank water and fishes from the buckets. I kept some of the water just in hopes of helping with water temp and so on. this tank has been up n running for over a year with no issues, I am running a fluval 406 and eheim 2217 with a tunze 6015 powerhead to help with waterflow and there is hydor 600 in the tank waiting for a replacement bushing that I lost. So I woke up this morning and checked the parameters.

Ammonia- .5
Nitrite- .25
Nitrate- between 5-10


So I did a water change about 30-40% right away. I have been checking water all day and about 10 hours later

Ammonia- between 0 - .25 looked like to me, my fiancée said it was at 0 api test kit was hard to tell for me this time
Nitrite- 0
Nitrate- 10-20 (15)

I noticed my Carpintis Flashing some which is rare but he will do it every once in a while.
should I wait until tomorrow to do another water change or do another before? any advice would be appreciated

5 inch Carpintis
3 inch Green Sev
2 1/2 inch Nicaraguan
1 1/2 Inch convict
5 cories
3 danios

I was thinking of adding some seachem cycle. I have used it before not sure if it really does much. new the substrate would have bb just though the filters would be able to handle it, not very smart thinking I guess. I haven't fed them at all today I will hold off on that until things settle.