07-18-2013, 12:02 AM
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An inch from the top is a bit risky. If you want them to survive I would postpone the water changes. If you can relocated the pleco, I would. I have gone up to a month here an there on my tank that I typically do bi-monthly. Every set up is different though. I am not sure if the pleco intentionally searches for eggs but due to there size and sucking behavior, they can easily destroy the eggs on surface in which they cling to.
If the eggs are exposed out of water, they could dehydrate. I don't know how tolerate the eggs are but why take the risk.