I just found this on CaribSea's site:
While Eco-Complete™ Planted does not affect pH and KH long term, you will find that it will give a small bump to both of these parameters initially, and this is especially noticeable with the use of RO /DI water. Fortunately this is just a small amount of Calcium Carbonate that is on, not in the substrate and it will dissipate with the first couple of water changes, usually in the first couple weeks. Planting the tank will also help. Keep in mind that one should never add particularly sensitive animals to a tank in the first few weeks anyway but that this is especially important with this situation if the animals are pH sensitive- requiring a low pH.
Little bump. HA! That's a pretty big move if you ask me.
So, let me ask this. During the time that these parms are out of whack....will it affect my plants? Do I need to move them to another tank while it settles down? Tank still gets ferts and CO2.