What is considered too high a TDS reading for spawning chocolate zebra plecs? Do TDS requirement levels for spawning vary alot from plec tp plec? I did think though TDS had somthing to do with ph though although have i misread somthing somwhere? Sorry for all the questions!
ps: the new tank will be 6ft long, 4ft wide and 2ft high which will be 288 UK gallons and 345 US gallons

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Main questions 2: in my current tanks i have an assortment of 11 guppys, 2 common plecs(one 7inch, one 6inch) and 1 sailfin plec(5inch), 1 para plec, 2 mollys, 7 platys, 9 peppered/albino/panda corys, 1 armoured shrimp, 4 black khuli loachs, 3 apple snails, 3 giant ramshorn snails and a load of trumpet snails and 15 neon tetras spaced out between the tanks.
All of these fish apart from the betta and apple and ramshorn snails will be going into the new 345gal tank. I will be eventually adding an extra 29guppys, 3 mollys, 13 platys, 3 more para plecs (if i can get hold of them), 4 more of each type of cory i currently have plus maybe some new types, 6 hillsteam loachs, 3 clown loachs, 5 more armoured shrimp, 4 more khulis and another 10neons and perhaps another type of peaceful tetra and as many chocolate zebras plecs i can get hold of and some other small growing L number plecs..."phew"!
The 3 main enviroments in the tank will be 4 large bogwood piles making caves for my 3 large plecs to sleep in during the day, large heavily planted areas in the tank with fine white silica sand covering the bottom of the tank with big open spaces to make terotorial boundarys- i will be constructing large pebble, tunnel and rock piles where the current from the tank filter is strongest in the tank, im hoping these expanses of rock will make ideal breeding grounds for the chocolate zebras and perhaps other L number plecs and of course the hillstream loachs if they decide to.
Will the other non plec fish bother the chocolates too much for breeding or do they not mind other company? All the other fish in the tank are very peaceful fish, but i want to know wether such a large tank would make good breeding grounds for them or wether they would prefer a small tank? I want to avoid setting up separate small tanks as much as posible because it is going to be a large job maintaining the big tank and i need as much time on my hands to do it as posible, so if i can avoid setting up tons of other tanks i would be very happy.
With my current tanks, i am chucking away the 50gal because it has alot of chips around the top and isn't the safest of tanks, i will be turning my 30gal hex tank into a livebearer fry tank and the 10gal will be a quarentine tank, although i have a spare 20gal and 30gal tanks in particular that i might use instead.
What do you think of this plan?