So in inches, that’s 20x14x18. Those are the dimensions of a very tall 10 gallon Because of this, you are more limited on stocking. Instead of 5 albino cories, you could consider a group of 8 to 12 Pygmy cories. I think you could do a bristlenose pleco, but you would need to choose the pleco or the cories, not both. Bristlenose plecos need at LEAST 20 gallons, because of how much waste they produce. The cories would be a better choice and likely more enjoyable to watch.