Greetings Fish People, and allow me to introduce myself! I'm DT, and while I'm not "new" to aquariums, I will say that until recently I have had 10 gallon tanks now and again for the last 30 or so years. Recently I lost control of my senses and got a 90 gallon with a beautiful cabinet and canopy (used), plus the sump, CO2 set up, some plants and a piece of driftwood. I've been reading and researching and poring over all sorts of forums and I have learned one thing in abundance. For 30 years I have done so much incorrectly. So, now I know. My fish will be in great care this time! So, after setting up my tank, with the help of the guy who sold it to me, the first thing I encountered after cycling it and adding a few fish was a horrendous crop of brown stringy algae. More reading, more researching...I cut down the light period to 5 hours, applied the full recommended amount of ferts, both macro and micro, and added otos, Amano shrimp, nerites, and two decent sized Siamese algae eaters. It took three weeks, a couple of water changes, and pulling some plants out to clean them but I am now free of that stuff and hope to never see it again. So now, finally, I am at my question. I have a pest snail infestation that is getting out of control. I was all set to add four or five kuhli loaches until I read that they should be in a tank with sand as the substrate. My substrate is the crushed clay gravel and I'd be lying if I said the gravel was smooth-edged. It is not. I was intentionally avoiding clown loaches because of how big they get at maturity. Since this is ultimately going to be a discus tank I am working hard to keep the bio-load small in anticipation of adding them later so I want to avoid other potentially large fish. Do I have any alternatives for snail-control via fish species? Should I consider, instead, the assassin snails? If yes, how many would be recommended? Apologies for the length of this. No one has ever accused me of being succinct. And thank you for any and all bits of advice! 90 gallons freshwater 9 neons, 2 danios, 1 rasboro, 2 SAEs, 5 otos, 6 Amano shrimp, 4 nerites, and a betta boy.