Also remember that dissolving it in water will greatly increase the speed at which it degrades. Unless you store the solution in the dark & frozen, its very likely that a significant portion of the 4-aco will degrade to psilocin, then inactives.
liquid dosing is fine for phens, but i never understood why people did it with sensitive tryptamines that are known to degrade much faster stored in aqueous solutions unless they are planning to consume it within a few days of dissolving it. & with 250mg ~10-15 doses worth (assuming thats how much it weighs, for all you know it could be more/less than that by a significant amount) i think its just a bad idea & will probably waste alot of it due to degradation.