That begs the question, how many scrubbies = 1 gallon worth? Shouldnt be a problem getting more than enough into the sump. My bio filtrations needs are very low, since the plants and the surface area of the plants should habdle it all fine, but I always want more than enough bio media in the system on 'standby', incase the demand spikes for one reason or another.
Another question I have pertains to heaters. I have always heard good things about and only ever used visi therm heaters (stealth model, and delux model). But my heating requiremnts are going to be like 1,000W or more. I will probably do all I can to retain heat, lining the back of the tank with styrofoam, base of the tank, and probably sump tank too. The room its in rarely gets over 68*, at the most using a space heater might get to 70*. This is with the rest of the house at about 72. Now my favorite stealth heaters only go up to 250W, I dont feel like getting a boatload of heaters so what would be a good higher wattage choice? And those of you with larger tanks and sumps, were to you place your temp probe? In the tank or in the sump? I might be overthinking this.