ah damn, but yes thats the one!I can not see the link you just attached, I have no idea why, anyway I look for it as "Plant growht substrate" of the Tropica brand, and I must tell you that it is one of the best brands in products for plants, and plants too. This type of substrates are magnificent, but if they are removed they usually cloud the water, don't worry, make a change of 50% of water, add activated carbon to its filtration and no longer move the bottom of your tank, it will soon clear up.
i did the water change guess i just need the carbon, any suggestions on which one to buy? first time hearing of activated carbon!