Plecos will eat any eggs they come upon- yes.
But, if that is not a concern, they will keep your tank walls spic and span.
Thanks, Amy. Spic & span glass sounds good to me! Since the plan is to get a 75 G at the next Petco DPG sale, I'll have one breeding tank & one grow out tank--so a place to rehome plecos at spawning time .
Adding a pleco to keep your tank clean of algae is like "Cutting off the nose to spite the face" Even if they remove some algae from surfaces they will create more waste, which will increase the organics in the water column creating more algae issues. If your flow moves it all to the filter (which won't happen), once in the filter it is still part of the water column (until you change the filter) and will increase organics in the tank.
Other than that, if you haven't guessed, I really like plecos.
Anything that means less time scrubbing my glass is a plus in my book. Couldn't you just lower your water column dosing to adjust for the poop factor? That and regular WC should keep dissolved organics under control, no? I dose Thrive weekly and try to do a 20% WC twice weekly, and my only serious algae issues are on the glass. Otos graze on it but don't clear it, nor do the ghost shrimp or MTS.
If you want snails that absolutely won't breed in your tank then its nerites. They also do a great job on algae control. I find they do better on rocks and wood then the glass, but the glass is easier to clean. The downside is these things lay eggs that look like little sesame seeds everywhere. They will pepper your wood, your glass, your rocks, your plants, your substrate, everything. And they are annoying to scrape off. I have 3 in my spec v and I will never own another one again. I rather have baby snails then eggs that never hatch and are hard to remove.
So none of your fish eat the nerite eggs? I've got 3 assassins, and periodically see their eggs on my glass, but they don't last long. What happens if you just leave the nerite eggs there? If nobody eats them, won't they eventually hatch, but the larvae won't live because they need migrate to brackish water?