07-06-2012, 04:49 PM
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Use the Quikrete Play Sand to be safe. I have it in 5 tanks now, and am about to change over to it in another. I can't say for sure, but the construction sand might be sharper. I know the playsand is very smooth.
He is dead on about the play sand, i just recently(on the 4th) changed from gravel to sand and for around $2.50 a 50lb bag you can go wrong. It's easy to clean and what you do miss seems to clean up rather quick within 24h of the change water was crystal clear The Longest part of all this was sitting and cleaning the sand out 1 cup at a time! But dont worry if you dont get it all your filter will get it rather quickly. As for how i did it i Originally was going to siphon from my 20g to a smaller 10g tank but for ease and convenience i did so into 4 home Depot buckets. Filled one moved all my fish to it. Filled another and moved all my rocks/plants. Siphon the rest into the buckets took the tank outside dumped the gravel into another bucket. Took some of the water i siphoned from a bucket to run a quick rinse(didnt want to use reg tap) to get out any left over small gravel replaced wit with sand filled it up about 25% added my rocks and plants back where i wanted filled it up with my old water to a little over 50%, Did a water change on the bucket with my fish then added them in with it still a bit cloudy but was fine. 2 Days later fish are fine and very happy... My cory cats even more so :D